okay so we are going to cover the eye and the ear today as well as the eye dissection if I have time we will jump back to the brain if not then I'll just do the brain in a separate video but those packets cover all the same information so when we look at the I you said 148 148 in the manual okay when we look at the eye your eye is a special sense this special sense is going to have what type of structural neuron this goes back to Monday what type of structural neuron do we find in special Senses sensory Norm it is a sensory but what type automatic not it could be autonomic which we're going to talk about that in a little bit but think about structural structure tells you how it's made what it looks like these are uni uh neuron okay unipolar are going to be your typical sensory but these are special Senses oh you told us Monday um um uh being bipolar you got it's bipolar so when we talk about your eye and we talk about it taking in the light and converting that light to uh images all of this is going to be because of bipolar neurons bipolar because bipolar are special senses unipolar are your regular senses unipolar are your regular senses okay now when we look at this eye we can see on the outside of the eye we got these red pinkish structures these are muscles of the eye now what I want youall to do right now is move your eyes around look right look left look up look down turn them in a circle are you controlling which way your eye moves yes okay so that means that these muscles that we see are smooth cardiac or skeletal smooth smooth smooth mus skeletal because I can yeah yeah skeletal muscles because those are your voluntary muscles for these skeletal muscles will it be autonomic or sematic system controlling them somatic good job okay so we have six muscles that we are going to learn that control the movement of your eyeball these muscles are in two groups the groups are rectus and obliques in your textbook you can find this on page 342 you do not need to open that right now but in your textbook for reference you can find it on page 342 okay now the first group we're going to go over are the obliques okay the oblique muscles and I'm going to have to like switch between two different views just because of um the picture angles the oblique muscles are going to be muscles that run at an angle okay we're going to have two obliques Superior and inferior okay the superior oblique you can barely see it on this particular View but the S Superior oblique is all we're going to see is a tendon so let me go to a better picture of this do you'll see this right here this is a tendon of the superior oblique the superior oblique is going to run medially it runs medially and that's it's really important to get that little fact down because that's how you're going to tell some other muscles so the superior oblique runs medially we not actually seeing the muscle on the models we only see the tendon of the muscle and then our next one again I'm going to have to go to a different view is the inferior oblique the inferior oblique starts on the lateral side the inferior oblique starts on the lateral side so Superior oblique runs medially inferior oblique starts at the lateral side Superior runs medially in the inferior now the reason those directions are important is you have four other muscles called the rectus muscles rectus means parallel with the midline so all of these muscles are going to be running up and down or um s side to side on top on top and into the sides of your eyeball these muscles are named for their position so the easiest one to start off with is going to be this one this is on top of the eyeball so which rectus would that one be superior you got it so this is your superior [Music] rectus okay you're only seeing a little bit of it but which one would this be on the bottom inferior you got it okay now the other two the lateral and the medial rectus when you just look at an eyeball they everything looks the same so knowing the oblique muscles helps you with the lateral and the medial so again here is a side view a lateral view of an eyeball what is this muscle straight on top of the eye Superior Reus okay here we see the inferior oblique the inferior oblique is on the lateral side so what rectus is this one lateral re lateral oh lateral um just lateral rectus nothing too fancy over here okay so so here we have your inferior rectus right below it we have your lateral rectus what side does the lateral rectus so not lateral rectus I'm making up words now we have inferior oblique what side does the inferior obliques start on the L lateral so this one right here is the lateral rectus if that is the lateral rectus what is this one right here all the way medial rectus good job okay so those rectus muscles tell us a lot okay so here's our Superior oblique again your Superior oblique runs medially so what is this muscle right here if the superior oblique runs medially medior Reus perfect what is this one on top L superior rectus okay what is this one on top on top Superior superior rectus good job okay now look where the superior oblique one that runs medially so what is this one way over here perfect now in real life they're all on the same model but you have to get the Angles and pictures correct so that's why I went back and forth between two models so as soon as you can identify the superior and inferior oblique that is going to give you your direction for your medial and lateral rectus number um medial and lateral rectus so your eyeballs these six muscles they are controlled by three different cranial nerves so what you're going to notice today is I'm going to introduce cranial nerves as we go through so you can have some reference to how they work with your body so there are three cranial nerves that we use for eye movement eye movement these cranial nerves are going to be oculu oculomotor that is cranial nerve three trolear cranial nerve 4 and abducent cranial nerve six okay there's a really silly way to remember which cranial nerve goes with which muscle so everyone has seen empirical formulas before in chemistry even if you haven't taken chemistry you've seen it before because you've seen stuff like H2O C6 h126 these are just empirical formulas that's the fancy name for them they're just chemistry formulas so there is a silly empirical formula that they make up for these okay the first one is going to be lateral rectus six LR six so abducent is cranial nerve six when you think of abducent what motion does that sound like with joints AB abduction abduction and that means you're going away bring apart I'm sorry say that again saying to bring apart but yeah basically to bring it to the side so you're going away from your body so anytime you take your eyeballs and you look to the side so your right eye goes to the right side your left eye goes to the left you're seeing kind of peripheral vision that's your abducent muscle pulling your eye sorry that's your abducent nerve telling your La um lateral rectus muscle to move your eye to the side so we remember it as lr6 then Superior oblique for your Superior oblique so this tendon right here that we're not seeing the muscle that is going to be controlled by cranial nerve 4 which is your trolear nerve that allows your eyeball to look basically crosseyed so when you put your eyes and you look at your nose that allows your eyeball to look down and at an angle and then our last one is all the others so medial rectus superior rectus inferior rectus and inferior oblique all four other muscles are controlled by cranial nerve 3 oculo motor what does oculo sound like this is one of the terms that you learn for exercise one what does ocular lens tell you I guess we left it in exercise one you can see ocular lenses okay so what is so say that Chelsea what does ocular tell you Vision see okay not seeing but what do you use what what do you use to see your eyeball the mot mean say it again what does motor mean move uh sending information okay what type are we doing movement or sensory movement sensory movement oh the one that takes in the image and reg this nope that's sensory ocular motor means eye movement oh okay so all of the all the four other muscles are being controlled by your ocular motor nerve so this is just a silly formula to help you remember which cranial nerve controls which muscle lr6 s so4 the O right here stands for other muscles which are your four other muscles and they're all controlled by the cranial nerve 3 ocular [Music] motor okay so we're going to do something real quickly we're not going to spend a lot of time because we have a lot to cover but I'm going to label some stuff and you're going to answer in the chat you can use short hands so you can use abbreviations just for time okay put one through four in the chat you can use shorthand what for okay I'm G to give you about another minute I like your style Sarah same with you Veronica same with you Daren much shorter to write all those okay so what we're gonna do is I'm just going to go through them it looks like almost everyone that posted got one and two correct and a few people mixed up three and four but a majority of people got them correct so one is on top it's running parallel to the midline so that's your superior rectus two is on top but it's running at an angle Superior oblique your Superior oblique runs medially so since it runs medially we know that if this is your Superior oblique right here and this is on the medial side this must be the lateral rectus and then four is going to be on the same side as the superior oblique so that's your medial rectus okay bonus put it on in the chat no real points Associated number three is controlled by which cranial nerve number three is controlled by which cranial nerve number three is controlled by which cranial nerve okay we have about eight people that put the answers in there we go we got some more cranial nerve six which is the abducent nerve abducent nerve okay so we're going to move to the next slide this next slide is just another model has the same structures on it but on this slide we have this little thing that's sticking off the top how do y'all keep your eyes moist what does your eye produce what do you do if you're sad tear tears tears okay so your eye has a lacrimal gland that is what this is the lacrimal gland it will produce tears and the tears go across your eye to keep it moist the tears will drain into a duct that connects with the lacrimal FASA so y'all remember learning the lacrimal FASA of the lacrimal bone yes ma'am so the tears go across your eye keep it moist go into the Ducks which are in the lacrimal fossa okay now your lacrimal gland is controlled by your facial nerve which is cranial nerve number seven the lacrimal gland is controlled by your facial nerve which is cranial nerve number seven elal gland is is controlled by the facial nerve now in a normal day do you think about keeping your eyes moist no no no so this is autonomic you don't control it can you make yourself cry yes but in general you don't control the lacrimal gland now if the lacrimal gland is on a Model it makes your life so much easier to name the muscles the lacrimal gland is always going to be superior and lateral so it's basically I'm going to put my camera on real quickly if you can see me you might want to make me a little bit larger your lacrimal gland is always right here so it's on the sides of your eyes above them so if you have a lacrimal gland on the model that means that this muscle is going to be which rectus muscle it's going to be medial lateral lateral lateral re it's going to be lateral because your lacal gland is always superior and lateral so if the lacrimal gland is present it makes your life easier with muscle identification okay now your eyeball is composed of three separate layers so if you turn your um textbook I'm sorry not your textbook your manual one page on page 150 all of this stuff is going to be listed okay the best picture for this is Page 588 that is the same picture that you labeled if you turned in your pictures 150 so 150 in your manual okay now as we go over the parts of your eyeball there is a chart in your textbook table 171 that gives you brief functions of everything so it just makes it all real concise and on one page so again you don't need to turn to that now I'm just giving you page numbers for reference so we've gone over your outer eye muscles we've gone over your lacrimal gland but there's one nerve that we haven't covered and this is the nerve that we use for vision what is the nerve we use for vision optic optic so trolear is a motor neuron so it's only used for movement this nerve right here is the optic nerve and it's cranial nerve 2 a easy way to remember that the optic nerve is cranial nerve 2 is how many eyeballs do you have I have two you have two and what is your optic nerve two two so your optic nerve is cranial nerve two this is a sensory nerve only only sensory there's no movement involved it's only sensory since it's for your eyeball and your eyes a special sense what is the structural classification of neurons for this nerve bipolar Bol good job okay so you'll see the optic nerve on all models it just depends on the angle because you have to see it from the back so this model you can't see it on it because it's hidden there it is like it's just half of it on this model um we saw it on that model this model you can't see the back of the eye can't see the back of the eye this model right here optic nerve back of the eye so optic nerve is always in the back of the eye okay now your eyeball is broken into three layers we call these layers tunics so if you're from the 80s which most of y'all aren't in the 80s you like to layer a lot so you bought all these tunics and you would just layer them on top of each other so tunics just a fancy word for layer the first tunic is the outermost layer the first tunic is known as your fibrous tunic what do you think this layer is made out of based on its name fibers lots of fibers what is one of the strongest connective tissues where the fibers run in all different directions fibd dular irregular so most of your outer layer is composed of densey regular so in this picture this white here is the outer layer most of it called the Scara the Scara is made out of dense irregular it is very tough very difficult to get into but that's first protection so you can see on the edge here all this white that's the Scara it's just different views you say dense regular irregular okay now the next part of the Scara is the clear portion in the front of your eye this is what you would put a contact over what's that part called pupil Cora the pupil's underneath it but it's someone just said it I don't know who's so this clear part that is the cornea so the cornea is the clear portion on the anterior part of the eye so it's only on the front of your eye the scare makes up the bulk of your eye you say clear part on the what side front yeah I thought you said lateral or something front Okay okay so our next next layer is going to be the vascular tunic the vascular tunic it has a lot of parts to it a lot of parts okay the vascular tunic is going to be made up mostly of something called the coreid coat so here on this model what we're seeing is we're seeing the Scara but here is the second layer the second layer is known as the choid coat some people just call it choid that's fine this layer the choid is part of the vascular tunic why do you think it's part of the vascular tunic what does it have a lot of a lot of fiber not fibers blood and ve vels blood vessels blood vessels so think the word vascular is vessels so the choid coat is part of the vascular tunic because it has lots of blood vessels so we can see here it's the second layer of the eyeball we have Scara on the outside the choid on the middle and then you can see on this particular view of the choid you can see all the blood vessels so lots and lots of blood vessels okay now the choid is going to go to the front of the eye at the front of the eye the Coro coat meets these tiny muscles these muscles are known as the ciliary bodies now this is not on your packet but it helps you understand everything else okay the Coro coat meets the cigary bodies which are these muscles where they meet each other is called the aura Sada where the choid meets the ciliary bodies is called the aura Sara the word Aura means Circle Sara is serrated edges so basically where they meet each other it forms this scalloped Circle so right here where you see the kind of that dark burgundy that is your aura Sera so the choid me the ciliary bodies where they meet each other forms the AA Sera and it just looks like a scalloped Circle that's not actually a muscle though it's just where they connect it's just the it's just the um the the joint or not joint not a real joint but like the junction okay thank you and the cool thing is the oros serata no matter what model you look on you can see it really easily because it's basically a scallop Circle you can also see it really well in a sheep ey so it's one of those points that you can refence okay now the cigary bodies even though they're not on your packet they're really important because your ciliary bodies are going to move forward and when they project forward they form the colored portion of your eye what is the colored portion of your eye called Iris the iris got it okay in this model there's a blue iris if I go back to this model what color is the iris in this model Brown so irises can be lots of colors your iris is just an extension of the ciliary bodies your iris is just an extension of the ciliary bodies so really your iris is the ciliary bodies but it has pigment on it and that's where we get our color now your iris is not a solid structure so here we can see that we have a blue iris here we can see we have a blue iris it's not a solid structure we have a hole in the middle of it what is that hole called pupil pupil got it so that hole is the pupil and then the colored part is the iris the iris is just an extension of what theary body sary bodies okay it say bodies you can say bodies okay okay now right behind your pupil so you can kind of see that pupil right here right behind your pupil we are going to have what I call a Smo marble so a marble that kind of got stepped on so it's not round anymore but it's not totally flat either this SCH marble is what refracts light bends the light onto your visual sensory receptors what are y'all wearing glasses so y'all can see lens lens okay so this little marble is the lens uh I'm going to show you a marble that's been taken out do y'all see this guy right here it's not quite round but not quite flat M that that is your lens so it's like a marble that got pressed a little bit okay now your lens does not magically sit in place so your lens is just not going to stay where it's supposed to because you want it to we have stuff that attaches your lens and holds it in place okay so what is the function of the lens it helps the lens bends light and that's what allows you to see you say vent bends oh bends refract yes refracts okay so your lens is held in place by stuff called suspense Sor ligament suspensory ligaments so these are basically Little Fibers that suspend the lens in place there is a second name for them you are welcome to use the second name it's called zonular fibers I feel like suspensory ligaments tells you what it is a little bit better and these are just tiny little fibers that hold the lens in place these fibers connect to the ciliary bodies supposed to have two L's these fibers connect to the ciliary bodies now this is what's going to start to make sense can your pupil in your eyeball change size yes yes say that with confidence Chelsea yes okay well the reason it can change size is that your pupil is actually made of the iris the iris forms that hole and your iris is a muscle your iris is just an extension of the ciliary body IES so that means your ciliary bodies are a muscle so anytime the ciliary bodies contract or relax that actually affects the muscles and it affects the shape of the iris and the shape of the lens so if these muscles right here these are your ciliary muscles if these muscles contract cont ract that means they're going to pull the fibers this way if these muscles contract they're going to pull the fibers that way they're pulling the fibers from opposite directions and so the lens is going to get flatter if these fibers relax the ciliary muscles are going to relax the tension on the fibers which which means those fibers aren't going to be pulling on the lens anymore and that means the lens goes back to its more marble like shape do y'all know what determines all of this movement what goes through our eyeball that helps us see optic nerve well the optic nerve is what's going to actually take what we see but what's going through the eyeball so it comes through the cornea through the pupil through the lens and back to the basically light so the amount of Light present changes how your lens is going to be focused and your lens is only focused because these suspensory ligaments are pulling or relaxing so what's really neat and again y'all don't get to see this is often when y'all dissect a sheep's eye the lens is missing or you can tell that the lens had some type of disorder to it because instead of being relatively clear it's like dark dark coloration or it's crystallized so there's a huge chance that the Sheep couldn't see so you get to actually see what these structures look like okay so let's go over those parts again before we move on to the inner layer and we're gonna kind of do this quickly so be ready to type your answers in okay identify one in the chat okay identify by two identify three identify this hole identify the smoed marble identify this nerve and tell me the number as well as the name nerve tell me the number and the name [Music] [Music] okay identify these muscles here [Music] identify this white layer oh okay and then last this scallet circle [Music] Dr R uhhuh where are the suspensory ligaments can you point those out again too I think I'm getting them they're hard to see in this model those are something I usually show y'all on the actual sheep but in this model they would be these little boxes okay okay yeah they're not easy to see on the models okay I'm going to go over the answers um everything I've seen so far has been correct I may have missed one or two that people posted because it moves really quickly when you'll answer but I'm just going to go over them one is choid two is cornea three is Iris four is pupil five is lens six is cranial nerve 2 AKA optic because we have two eyes so cranial nerve 2 seven is ciliary bodies eight is Scara and nine is orera so it seems like people got it really correct so I'm proud of y'all for that there's one last thing I want to ask y'all and I want you to think about this do you control your pupil size nope okay if you don't control it is it skeletal muscle oh no is it cardiac muscle no so what's the only muscle that can be it's smooth smooth okay so your ciliary bodies are smooth muscles and your ciliary bodies are controlled by cranial nerve 3 ocular motor so basically your ciliary muscles and your iris are controlled by the ocular motor nerve too cranial nerve three if it's something that you don't control is it autonomic or sematic autonomic you got it so what this shows us is that cranial nerves can have multiple paths on them your ocular motor controls most of your ey's skeletal muscles so that's sematic but your ocular motor also controls the smooth muscles in your eye which is autonomic so even though it's one cranial nerve there's different paths within it like two functions basically two functions okay now our last layer is is going to be our innermost layer and this innermost layer is known as the sensory tunic the sensory tunic this is where your special sensory cells are located so your sensory tunic in this particular view is kind of this peachy beige and the bulk of your sensory tunic is the retina the bulk of the sensory tunic is the retina is that um the redtin okay now the retina as you can see doesn't quite go all the way up to the front of the eye it stops also at the AAA so what I'm about to show you is a picture of the eye like the eye got cut in front and back Hales so we're going to look at the back half for a second so again this kind of beigy color is the retina and the re is going to have quite a few parts to it um so to understand why it has these different parts we need to know about the two sensory receptors it has in it the retina has two sensory receptors it has cones and it has rods these are basically sensory cells that detect different light wavelengths cones are going to detect color rods are going to do black and white okay now the area that is considered the middle of your retina so this is where you have the most sensory receptors in a spot which means you got the best Vision in this area this area is called the macula lutetia you cannot see that pink hold on let me get a different color let's do yellow can't really see the yellow either let's try blue okay this right here is the macula ltia that area is gonna have the most sensory receptors than anywhere else in your eyeball so you have the best Vision in that spot say most sensory what receptors so when light comes through your eyeball so light comes through your Coria through the pupil keeps going back the area the light hits on is the macula lutea now a lot of times that's not what happens because our eyes are not able to refract light very well and that's why we wear glasses but if everything was perfect the light would bend directly onto the macula lutea now do y'all see that that little spot right in the middle of the macula lutea that's yellow that is the exact center of the macula lutea and that is known as the fobia s Calis or you can call it central phobia both names are fine with me Central phobia might be easier to remember the fobia centralis is the exact center of the macula it's the exact center of the macula wait and it only contains cones the phobia centralis is the exact center of the macula and it only contains cones so what can it not detect if it only has cones what can it not detect black and white black and white you got it so your goal whether it's your not eyes naturally or you wear glasses you wear corrective lenses your goal is to have the light refracted into this area into the macula into the central phobia that's your goal but we know that that's not always what happens sometimes our light might hit areas around here okay we still have cones and rods in this area but they're not as plentiful so has everyone had an experience where you see something happen to the side to your peripheral vision and you know something happened but you weren't quite sure what you saw yes thank you for making me not feel crazy okay that is going to be your peripheral vision you still have cones and rods but just not as many because the light's not refracting directly on there so you don't see as clearly Dr R uhhuh so what is the blue arrows you drew uh on the model on my right we haven't gotten to it yet we've only done the macul which was two no no no I mean here on this other model where you oh this one I was just talking about the pathway oh okay okay thank you now have y'all heard of the disease macular degeneration no no no okay what do you think's happening here yes probably the macular is having problem with the cones and rods maybe okay so degeneration is basically when that area of the macula starts to basically break down okay if it's breaking down it's going to have issues with your cones and rods because they're no longer intact so do you think you're going to be able to see as well I guess it might be color blind not it's not just color blind are you goingon to be able to see if you don't have any cones and rods in this area oh no because then that's where you have your Best Vision so no okay so was that correct Dr r yeah it's it's it starts to degenerate so this is basically what happens okay you see how clear this little kid's face is yes and then do you see how it gets blurry oh but do you see the outside area is still relatively clear yeah because it's degenerating right in the middle where light lands so it almost is like whatever's in that Central View is going to be blurred out secularized so macular degeneration is real it happens macular Detachment or retina Detachment happens too so basically you're saying macular degeneration is when you can see something centrally positioned but you can see the it's G to blur out the center V Vision I leave you with the periphery okay now the last part that we're going to go over of the sensory tunic is the area that your optic nerve exits the area that the optic nerve exits is called the optic disc this area has no retina covering it so where the optic exits there is no retina covering it if there is no retina covering it are you GNA have any cones or rods no no so can you see at all in this area no do y'all know what this area is called functionally blind spot you got it BL the drivers around me sometimes don't drive on the road if Veronica's driving so your optic disc is the blind spot it's the area where the rtina exits the eye and the optic nerve exits the eye and because everything is exiting the eye it's not actually covering that portion which means we have no cones and rods everyone has their optic disc now the optic disc is also the only place that the retina attaches to the eyeball so all of the area around the optic disc all this area whoops all this area is not physically attached to the eyeball the only place the retina is attached to the eyeball is the optic disc so any type of major back of the head trauma that can actually cause you to kind of Whiplash and that can cause your retina to detach from your eyeball and that can be fixed if caught early enough so just St to think about so you said the retina is attached to what through the optic disc that's the only place the retina is attached to the eye oh okay so that's the only place that holds the retina down is the optic disc okay we are going to do a quick little overview again I'm just going to put some numbers down and then we're going to go over the last three parts of the model that we're going to learn okay you're going to do one and two since they're already labeled for me so do one first okay go ahead and do two coming okay what is this layer called labeled three [Music] okay and then what sensory receptor is missing what sensory receptor is missing from four what sensory receptor is missing from four okay bettered really well so one was optic dis two was immaculate ltia three was retina four is rods okay now we have three more parts to go over and we are done with the eyeball I'm going to go back to this [Music] picture and we're going to go over the eye Chambers so if you notice your eye at least in the pictures it looks Hollow so it looks like there is nothing in this space right here but that's not true okay the bulk of your eyeball is going to be from behind the lens to the back of the eye this whole area this whole cavity is known as the vitus chamber and it is filled with a jellylike fluid called Vitus humor you're often hear it called Vitus body I don't care which one you use so this chamber is the bulk of your eyeball and it's filled with this jellylike fluid that basically supports and nourishes the different structures how many of y'all have been to the eye doctor when they put the little poof in your eye me okay thank you Chelsea you're reminding me I'm not crazy so what that little poof does is it one of the reasons they use it is for pressure so they're looking at the pressure within the vitus chamber if your pressure is super high that's dangerous if it's super low that's dangerous and when you look at a sheep's eye today when we look at that what you'll notice in the sheep's eye is that it looks like clear jelly like something that you would put on a sandwich like peanut butter and vitrous humor sandwich yep okay but that's only the bulk of the eye we still have another cavity I'm going to erase this just so we can see this other cavity as clearly as possible this other cavity that we have see what color is going to show up well let's try this color the other cavity that we have is going to run from the lens to the cornea this is called the anterior cavity from the lens to the cornea is the anterior cavity it's in the front of the eye but you'll notice that the anterior cavity is broken into two parts the anterior chamber and the posterior chamber okay on the test you're only going to have to identify the anterior chamber the anterior chamber is going to be the space between the cornea and the iris the anterior chamber is the space between the cornea and the iris the anterior chamber is the space between the cornea and the iris so you say identify the internal space the internal so on the test you won't have to identify posterior chamber only anterior chamber okay now your anterior chamber is going to also be filled with a fluid this fluid is called aquous humor this fluid again nourishes and supports the area but what's cool about this fluid is that about every 24 hours it's brand new so your body constantly makes the aquous humor it nourishes and what supports the eye okay so y'all take a five minute break we'll come back we're going to do the Sheep eye dissection and then we'll do the ear so take a five minute break I'll see y'all back here at 9:23 e e e e e e e e okay everybody we are back and we will be going to the eyeball let me find the what I'm looking for is this what I'm looking for yes but I'm missing one picture I need okay let me see if I can bring this picture in that okie dokie so we are going to go over just basic eyes dissection this are the same parts that you've seen that we just went over they're just going to look a little different because they're real and they're not a model so this is an eyeball from a lateral view there's going to be three things you can identify from this view I am going to mark them and give yall a chance to identify them first you're G to do this in the chat okay go for it for okay good job next is going to be this this outer layer for good catch Tyrone okay so the key here was outer which layer is our outer layer Scara the Scara so it is white it's not as nice as you know seeing a Fresh Living eyeball since these eyeballs have been preserved their colors will change slightly okay now there's one thing that we did not go over that is on page 150 that you still want to know has anyone had pink eye before yes okay yes it's not fun at all pink eye is an inflammation of the membrane that covers your Scara this membrane is known as conjunctiva conjunctivitis the membrane the conjunctiva membrane you can't see it but you know that it covers the Scara so you cannot see this membrane but you know it covers the Scara so instead of me saying identify this layer I could say identify the membrane covering the layer and what would that answer be conjunct whatever conjunctiva so even though you can't see it it's there it's just a real thin membrane that covers the whites of your eye and it actually covers your inner um eyelids too but that's hard to show because I don't have any eyelids on this sheep okay this is the front of the eye in a living eyeball it is clear front of the eye in the living eyeball it is clear okay good job okay so one was optic nerve two was Scara three was corny yeah now those are the only three things that are really easily observable from the outside of the eye and that's because the eye has been preserved so it's losing those nutrients that keep its normal coloration but what we're going to look at is an eye that has been cut and so you're going to see that I have lots of different views of stuff of the eye that's been cut and I don't like some of these views I guess let me add some more pictures gu got to find the ones I like I know I have them I like this one much better okay so This Is A sagittal [Music] view I'll just delete that one for now this is A sagittal view of your eyeball so we basically took the eye and we cut it so we're getting right in left halves and we cut it right through the cornea so we get equal halves okay you can see all of this stuff in the back all of this junk right here that's muscles and fat so some of those are the rectus muscles oblique muscles that we talked about because when they take the eyeballs out of the sheep they basically just you know tear them cut them towards the end of them okay now if you look here at number nine tell me what number nine is cornea good job okay in the chat tell me what number four is okay what holds the lens to the ciliary bodies what holds the lens to the ciliary bodies so what holds the lens to the ciliary bodies dispensory ligaments yep but let's put them in the chat so everyone has a chance okay so suspensory ligaments hold the lens to the ciliary bodies Dr what does the or S do again it's just the meeting point between the ciliary bodies and the Coro coat Oh I thought is that the circle no yeah yeah it's the circle sorry it's the Circle it is okay I'm sorry I thought you were something that I drew or something yeah it's where the it's the scallop Circle okay okay look closely and put this in the chat tell me what number seven is pointing to it's that outer layer okay great job everyone put Scara now what is this chamber that's the bulk of the eye put that in the chat what is the chamber that's the bulk of the eye it's number one in the picture what is the chamber that's the bulk of the eye good correction Chelsea c p okay good job everyone put the vitus chamber okay what is this chamber that's behind the cornea that's labeled three the chamber behind the cornea labeled three chamber behind the cornea labeled three for okay great job what liquid or what jelly fills the anterior chamber what liquid fills the anterior chamber okay excellent job for those that answered y'all all answered aquous okay now we're going to go on to the inner layers which are just a little bit more difficult and that's only because they're harder to see but the good thing about the Sheep's eye is the colors you can use the colors okay let me go see if I have a better picture of the next layer we're going to cover not great I think the one I deleted is the one I probably wanted okay we will go back to this one okay do y'all see underneath this beige area we have a smooth black area you can kind of see it right there that is the middle layer with all the blood vessels what is that smooth black layer that's the middle layer with all the blood vessels smooth black layer middle layer with all the blood vessels e okay for those that answered y'all got it correct the choid coat now do you see this beige layer that number six is pointing to that's the innermost layer and it contains sensory receptors what is the beige layer innermost layer contains sensory receptors for okay great job I'll put the retina okay so now we're going to just move to different views of the eye and just look at things that look a little bit different because they're not as beautifully cut identify this marble looking thing e excellent job that's the lens okay what is this colored portion of the eye colored portion of the eye great job what is this in the middle okay good job that was the pupil what is this layer that's all squinched up that's super thin and it's the innermost layer it got squinched up super thin innermost layer you can still see its coloration a little bit too okay good job y'all all put retina okay now here's something that we didn't see earlier all of this jelly that's in the bulk of the eyeball what is this jelly that's in the bulk of the eyeball the jelly that's in the bulk of the eyeball okay so let's go back and look at a picture because we had two answers that are floating around okay the bulk of the eyeball is this area right here what chamber y'all can just say this out loud what chamber is the bulk of the eyeball Vitus the vitus chamber so what liquid or fluid is going to feel that chamber Vitus the vitus okay the only place we have aquous humor is going to be here only aquous humor is going to be in front of the lens vitous humor is behind the lens okay now there's something that's brand new in this picture that you didn't see easily in the other picture and that is going to be this kind of iridescent looking layer this is a portion of your choid coat but it has a very special name to it it's named tapetum lucidum this iridescent portion of the choid coat the topedm lucidum helps reflect more light so this is what a lot of animals have in their eyes so they can move around more easily at night so you've probably seen pictures of animals or animals on the side of the road that you might see their eyes be green yellow blue red and that's because they're reflecting light and it's coming off of the topedm lucidum humans do not have this so the tapetum lucidum is really pretty um it just depends on how nice the youall see how pretty it can be I usually call it kind of like the rainbow effect really nice and iridescent it is part of the choid coat so it's not its own layer it's just part of the choid coat so you can just see different pictures from the web so this iridescent the topedm lucidum what is this black smooth area y'all can say it out loud Choy coat that is the coroy coat what is this thin beige area that got kind of moved out of the way retina that's the retina and what is that edge right there that's the outer layer Scara that's the Scara good job y'all so yall did great what is this opaque looking thing that you can't see through anymore L and what's this blob around it that jelly blob the vitous um humor Vitus humor perfect okay so while I give you a lot of different use of stuff in the practice packets you can just Google sheep or coow eyes they're the exact same looking so you feel okay with the Sheep's eye with the what with the Sheep's eye you feel okay with that yes okay so what we're going to move to next is we are going to go to the ear just got to find those ear pictures okay now this is showing me I have my ear pictures are so not in order give me a second I do not know why I have that out of order okay okay so this ear is going to start on page the the list is going to start on page 152 just the list all the information about it is going to be prior to that page okay in your textbook your your ear is GNA be found on these Pages 62 603 and 605 those are the main Pages you can look at in your textbook and then there's a great table of your ear which is 172 and that table's just going to give you an overview of the parts of the ear like what is their function for each major part okay so this is showing you a whole ear model from the outer to the middle to the inner so just like your eye there's three layers your ear has three divisions outer middle and inner area so your outer ear is usually going to be the easiest because there's only two parts that y'all are learning about the outer year you're usually familiar with these parts because you see them all the time so the outer ear we have this whole part so everything right there and then we have this right here this part is going to be known as the Oracle or the PA either name is fine go with the one you can spell and what do y'all think this is this tube right here the Helix no the Helix is actually the top part of the here so the Helix is all of this the external auditory canal you got it external auditory canal if you told me external ear canal that would be correct if you forget the word external it is incorrect because you actually have two canals so you got to let me know that it's external okay those are the two parts of your outou of year you got your PIN which also known as the Oracle and you got your external auditory canal those are the two parts y'all are learning that make you feel good for those two parts yes ma'am you're like w that was a good one okay I'm gonna go to a different model this one's just opposite side what is this air I'm just picking colors that you cannot see today what is this area called right here the Helix the Helix not the Helix y'all aren't learning the Helix ad ex what is your outer ear portion known as P orle the P oh so we don't know the Helix no you're just learning it as the P or the oracle but the book don't say it like that it's it's there you have to read through it okay that's the specific part the paen and the Oracle are the whole out of ear this is your lobe this is your Helix this is your date your tragus is right here but I don't have it on this model so your ear has so many parts to it y'all aren't learning the parts y'all are just learning it as one outer ear which is the PA or the oracle all right okay and the E now this goes back to exercise four in the chat tell me what is the cartilage your p is composed of what is the CH Cartledge your p is composed of put it in the chat you got a 33% chance of getting this right what okay right now we got three at Highland and five at elastic so we're at a 5050 chance that one of those is Right tiebreaker anyone want to be the tiebreaker and tell me which one they think it is elastic elastic yeah it is elastic Highland is um the most abundant cartilage we find it in the tip of your nose lining joints we find it in your costal Cartage baby skeletons but elastic is a little bit more sturdy because it has those fibers embedded on it so it's still flexible but much more sturdy okay what is this area that I'm doing this wave in put that in the chat [Music] [Music] okay y'all doing great external auditory canal or you can put external ear canal okay so outer ear is pretty straightforward we only learned those two parts the middle ear is going to have a few more parts so the first thing of the middle ear that we are going to learn is going to be your eard drw so this right here this is your eardrum do youall know the fancy term for eardrum tunic membrane not tanic tanic tanic that's what I mean okay you can also call it the tanon any three of these are correct eardrum tanic membrane or tanum you can use whichever one you're comfortable with Dr I just have a quick question okay you see you see what like the red those little red um right under the eardrum is the white with the little red hes uhuh is that bone yep that's bone that's going to be um spongy bone okay so all bones in your body have both spongy and compact that is showing you part of your temporal bone which is considered a flat bone and it's going to be on the outside it's going to be compact bone on the inside it's going to be like a sandwich and the spongy Bone's like the meat of the sandwich oh my world okay I I think I kind of Envision it a little bit okay so your eard drum is the end of the in of the outer ear and the beginning of the middle ear okay so your ear drum is going to to vibrate from sound waves and that vibration is going to move through the next few steps now do y'all see this nice big old tube right here that I'm doing this in The Little Wave in this tube yeah that tube goes to your throat so that tube goes to your nerinx region so you where your nose and your throat meet and this tube has two different names Veronica said one of them auditory tube that's the easier name to spell yes ma'am the other one is the harder one to spell is the station tube you whichever one that you are comfortable with oh I go with the first sticking with it so you can use auditory it's not in your manual but you are welcome to use auditory okay so we have your eardrum auditory tube and then we have this space that I'm just putting x's in all of this space that surrounds bones inside is called the middle ear chamber you can't you don't necessarily need to know it it's just the space around the bones we're about to learn so the middle ear chamber contains three bones that we are going to talk about the middle ear chamber contains three bones okay these are the three bones okay these three bones are known as your auditory oses the word ticle just means small bone the word auditory tells us that it's with our ear so these bones are super super tiny in real life let me show you how tiny hopefully it doesn't come up with the model which blows them up so you can see that this is 2 millimeters they're blown up a little bit here's a better one look how tiny these guys are this is the model we have in the classroom these are super tiny it's kind of like little toys yeah okay these three bones are super important for y'all to hear but they're super tiny okay the easiest way to remember these bones is by miss m i s okay malice incus yeah malice incus and stes the malice is connected to your eardrum so that is the bone that connects to the eardrum the incus is the middle bone so no matter what you see it's always the middle bone and then the [Music] stapes looks like a horse starup so if you've ever seen a saddle Saddles have stirups that's what it looks like the stap piece is going to connect to the oval window so we're going to see this in a model too this is just showing you the three bones on their own so the order that they go from Outer to Inner is malice Inca stapes is that stapes or stapes you can pronounce it either way it depends on if you're pronouncing it the European way or the American way okay that door do when reading the information I see that the malice and the Incas is connected to the stes but do all three of those bones sit into that overal window no just the stapes fits into the overal window so if you look at the end of it you see how the shape is oval I that's what fits into the oval window we haven't covered the oval window yet I just mentioned it so these three bones are those inner oh sorry not inner middle ear bones really tiny bones in your middle ear so when we look here let me erase all this this bone right here this bone is attached to the eardrum which bone would that be that's attached to the eardrum malice you got it okay the angle of this picture makes it really hard to see the incus as well as the stapes so either one um I'm sorry when you look at pictures angles will make a difference because it's easy to block things out so I'm going to go to this picture here this is your eardrum this bone is connected to the eardrum so which one is this malice um that is the malice okay this one is connected to the oval window which one is that and then this one's in the middle incus anus so it's just depending on the model that you see always Orient yourself with that eardrum the eard drum is where you begin you go in order Miss malice Inca saies that's the easiest way to do it so like you say um the malice connects to the eardrum stap is is in the oval window where would you say in because it's middle of where it's in the middle of the three bones oh so sandwich in between okay yep okay so we're going to go over all the inner and the outer ear we're going to do it just like we've been doing we're going to put numbers on it and then you're going to write it into the chat y'all can use shorthand good job y'all okay I just put number two up there in green no one's being brave I think it's just late yeah cuz they just popping up man okay can't believe this is our last day together number three y'all are going Fancy on me we got to be thanks Chelsea P okay okay number four is going to be this area number four is that area that surrounds those bones okay so one everyone put external ear canal or auditory canal either or fine two you station or auditory three eardrum tanic membrane four external sorry external middle ear chamber okay how many ticles are in the middle ear chamber you can just say it three three what is the osle attached to the eardrum the inkas the M what's the one that covers the oval window and what is the middle bone anchus you got it and y'all if you actually like get to see real ones or you get to see a model that has all the parts they have tiny little ligaments that connect to each other they're really cute okay so outer and middle ear done we are now going to go to the inner ear the inner ear just has the most parts that we're learning and so that's why it seems a little more complicated but it will make sense based on descriptions what Mullis do y'all see what mulles do you see here snail thank you okay here is your snail shell the sell the snail shell is known as the ca or you can call it the cocka each is either one's fine okay so your inner ear is going to be a bone it's the spiral bony organ but on the inside of that bony organ you're going to have membranes so it's like this Labyrinth of membranes inside of it so the outside is hard in its bone the inside is going to be membranes so if I took a little slice of this like this and I'm just looking at this piece right here so if I took this slice out this is what it's going to look like this is all bone all this white around his bone and then all this pink right here there that's not pink but it's still part of it all this that's all membranes so the outside is the bone the inside is that membrane Labyrinth and do y'all see how this bone is porous what type of bone is porous spongy yep and then towards the edges it's a little bit more solid so both spongy and compact are found in all bones in the body okay so we have our snail shell which is the ca inside of it little bit more complicated but this is our CIA okay now coming off of the snail shell you kind of have the head and the antennas this is just kind of getting abstract though do y'all see this head area yes that is kind of a swellen a swollen area so we have it cut open so you can see what's inside of it but in real life it would just be that white bone surrounding everything so it kind of just looked like a big swelling on at the edge of the ca that area is called the vestibule so that swelling where those two that kind of gray and bluish bulges are that area is the vestibule it kind of look like PR so yeah that's a good description and then the antennas aka the pretzel these are your semi circular membrane canals and there's three of them so those are kind of like the main portions of your inner ear but then we're going to learn the Parts within that okay now before we go into and jump into all the [Music] parts the cia's function is different than and the vestibules function okay I know those colors do not work with each other at all so I apologize okay the CIA is our hearing organ so when we talk about hearing we are actually referencing the ca the vestibule and the semicircular canals these are your balance organs you can also call them the equilibrium organs wait say that again Dr R the vestib and the semicircular canals are your balance organs you can also say that they're equilibrium so can you break that down so think about if you stand up real quickly if you turn yourself in a circle you maintain your balance you don't fall over and that's all to do with these two organs the vestibule and semicircular Canal okay and how these are built really tells you kind of what they do so the semicircular canals Go in all different directions these are going to help you with what we call dynamic equilibrium have any of y'all gone on a spinny ride like teacups or any of those rides that like swing you in circles yeah I do too I can't handle them your semicircular canals they help you with what we call dynamic equilibrium and that's going to be your balance when you go in many different directions quickly so spinning up down upside down so that helps you with balance in more directional movement the veses are what we consider static equilibrium and that is basically when you stand up when you're just going straight you're not really doing anything when you lay down that's kind of like the linear balance okay now I'm going to erase this so we can get to the nitty-gritty okay we have three semicircular canals this particular picture we are looking at is an anterior view this is going to be inner this is going to be outer so this is closer to your ear drum this is closer to your brain okay since we're looking at this from the front view the semicircular canals are always named for their position this particular semicircular Canal is all the way in the back which which one do you think that is the inner posterior so it's all the way in the back so this is your posterior semicircular Canal okay this one goes off to the side what what is another term for to the side lateral good job and then this one is going to be the that's most to the front what is this one anterior Anor okay now as those semicircular canals go to connect to the vesu that's swelling where they connect to the vestile they actually have swellings these swellings are known as amp ampule amp ampule are going to be swellings at the ends of the semicircular canals they connect it to the vesu Ule or swellings at the end of the semicircular canals swellings at the end of the semicircular canals and they connect to the VES canals that connect to VES and when I show you different angles you'll see them a little bit better I'm just trying to teach everything on this one photo right now so ampul is the plural huh yeah add in the E is the plural and the a is the singular okay yeah okay now our last two parts that we can see in this particular picture are going to be the utricle and the SACU the utricle is what I consider the upper sack and then the sacle is the bottom sack in this picture they're different colors you can't always guarantee that the models will have different colors so the utricle is that light gray the sau's almost a like a Dusty blue so I use just go with position the you trickles on top of the SACU and so earlier when I said that the vestibule was like static equilibrium basically these little sacks that you trickle in the saule they help with what we call linear move movement so you know up and down laying down so they're helping with that movement the you Trickle and the SE will help with that static equilibrium okay so let me go to a different View and we're gonna add a few more things to these views as we go through let me put my dog out of the room real quickly sorry they were taking their morning nap because sleeping through the night is not enough same for me I know I could use a morning nap too okay so when we look at this picture this is from the ant posterior view our last picture was from the anterior view you can still see the same stuff it's just a different angle what is this bony spiral shell co co co the coier yep now what is this top little sack called vest the vest now the whole thing this whole thing is the vestibule but inside of it we have two sacs oh the SACU and utricle so which one's top um the the utricle okay if that's the utricle what is this one then the S okay now remember we're at a posterior View since we're at a posterior view in the chat tell me which semicircular Canal this is in the chat tell me which semicircular Canal this is you can just put letters you don't to spell it out okay what is this one that Jets off to the side number two what is that one that Jets off to the side okay which means this one it has to be what what is number three okay good job y'all so one was posterior two was lateral three was anterior now there's something new that's on this particular model that we didn't see on the others because it's from a different view we have this cranial nerve back here okay this cranial nerve is the vestibulo clear nerve this is cranial nerve number eight vestibulo coclear nerve forgot the r okay if you break this word down it breaks into vestibule and CIA this is one nerve and this nerve splits into two so you can see here is the clear Branch I'm putting the C and then here's the vestib branch when they're coming from your brain it's one nerve and then they Branch into two the vestibule Branch goes to the vegetable the cier Branch goes to the CIA okay this is only a sensory nerve meaning it only detects sensory in so only detect stuff with balance and hearing now from this view you have a really nice picture of these swellings look at this nice little swelling and you can see it a little bit better right here too what are those nice little swellings called you can just say it out loud vesle well the this whole circular thing is the vestibule ampule you got it so the ampulle are what attach the semicircular canals to the vestibule so if we look at this really closely I'm going to do it in purple all of this is the vestibule okay all of this so that whole swelling is the vestibule and then you can see that the semic that the semicircular canals connect to the vestibule at the ampulle so these little Aqua sellings are the ampula so ampula attaches what so the ampula attach the semicircular canals to the vestibule okay I did not do a good job at Angles here let me see if I can grab one real quickly there we go I'm just trying to find decent one okay I don't really like that one I have it somewhere in my picture stash but finding it might take a bit of time it's just getting that model at the right angle okay okay I know it's labeled on here but do y'all see this shape right here yeah what what what shape am I drawing so what window is that it will be the over window what ticle what Tiny Bone and put this in the chat put this in the chat what Tiny Bone covers this [Applause] okay good job y'all put stapes now down here we have another window that's round in shape circular in shape based on that shape what do you think the name of that window is round shape round window round window this round window is only covered by a second Dairy eard drum so the round window is covered by a secondary eardrum okay okay in the chat we're going to do a few of these real quickly and then we're going to move to our last Model so I'm going to label them and then you can do them all at once okay oh let me do one more let me do five for okay I'm G give youall one more minute to get these in for I'm okay so for those that got it up most of y'all got them correct so number one was posterior semicircular Canal two was SACU three was ampulle four was the oval window and it would be covered by the stapes five is your cranial nerve 8 vestibulo cocar okay so now what we're going to do is as you can see if we cut the clear open and I showed yall this right when we started when we cut it open we can see that it's spiral circular repetitions if you look really closely you'll see three chambers in there a green a pink and a blue they repeat they repeat and they repeat so those three chambers the green pink and blue repeat on every single section of the ca on the inside so it's a continuous spiral with three chamers when I take a slice of the cleer so just one little slice and we look at it blown up that is this big old model right here wow so this is blown up huge because your ca is so tiny in real life it maybe if you curl your if you curl your pinky it may be a little it it's probably about half that size so it's really tiny but when you cut it open and blow it up this is what it looks like so we have the bone on the outside and then we have the membranes that go through the middle these membranes when we first start off the CIA so when you are developing in the womb you have all this bone and in the womb as you're developing it starts out as one large chamber but as you develop you'll notice that we now have three chambers what happens is during development a membrane is formed and once that membrane is formed we then get those three chambers so we start off as one big chamber and through fetal development you end up getting three chambers and those three chambers are separated by a membrane that forms okay the first thing I want y'all to notice is this letter I just drew in aqua I drew the letter Y youall see that letter Y I just drew yeah now that you said so I see it yeah okay so said the letter y is what I'm drawing over again okay this letter Y helps you with everything we're going to call this part the arm of the Y and we're going to call this part the back of the Y okay so right here that I'm doing in aqua is the back of the Y and what I'm doing in hot pink is the arm of the Y okay if you know the arm that's going to help you identify everything okay the arm of the Y is known as the vestibular membrane the vestibular membrane so arm of the Y arm of the Y will not get you credit but that's a way to remember it it's the it's the membrane at the angle that is your vestibular membrane the back of the Y is at the bottom so that is your basilar membrane now these are kind of the boundaries of this middle space this middle space is known as the clear duck and there is another name for it you can call it the second name if you like that's up to you the middle space is also known as Scala media we don't use that term in our manual but that is a technical name for it we use the term coduct so if y'all go to any other sites you may see it as a Scala media inside of the co- clear we are going to have the actual organ that helps us here okay this organ I'm kind of boxing in this green the spiral organ you got it now there's a few different names that you can use for it spiral is going to be the easiest so I'm going to do it in green over here you can call it the spiral organ or you can call it the organ of cour te I think spiral is a little bit easier yeah that is your actual hearing organ you're G to have hair cells in there and those hair cells are going to have these little cyia on top and these are not normal cyia they're called stereo cyia so hair hearing cyia and these cyia based on the movement of sound waves are going to go back and forth whichever way they move determines what you hear now how does that information of the CIA moving get back covering the cyia you are going to have this little membrane this membrane is known as your tectorial membrane the tectorial membrane is covering the spiral organ Dr R can you like label it so we know exactly where it is it's this green area that well now it's black that I'm going over okay okay now that organ the tectorial membrane is going to get information from the spiral organ those hair cells move back and forth and that information needs to get back to your brain so what's going to happen is this information is going to travel back to your brain through this swelling with lots of cell bodies do y'all remember what we call a swelling with lots of cell bodies Ula not an ampulle gang gang G okay this is the spiral ganglion or you can call it the clear ganglion either name fine so this is the spiral ganglion or the CIA ganglion use whichever one you're more comfortable with and you said its function is basically to transfer that sound wave to the brain yes it just basically transfers what you're hearing whether it's a high pitch low pitch base back to the brain thank you now it's kind of fuzzy on this picture so you're not really getting the full effect but if it wasn't fuzzy what you would see is a Soma with dendrites and an axon is that a uni by or multipolar neuron bipolar it is bipolar bipolar makes up special Senses hearing is a special sense so you're kind of lacking that clear Clarity on this picture because it's a little fuzzy okay so we have two more parts to go over and then we're going to do a little overview of it again so the last two things are the the two other chambers that we haven't covered so we haven't covered this chamber or this chamber this chamber that I labeled a is closest to the vestibular membrane fake vesul you got it so Scala is just a fancy word for chamber and since it's closest to the vestibular membrane we call it Scala vestibuli vesul VES okay which means this B1 that's closest to the Bas solar membrane can only be the one that y'all haven't learned yet which is Scala Scala tempani you got it so I use the vestibular membrane as my reference point of how to label everything that seems to help me out a lot okay so now we're going to go to a clean picture and we're gonna I'm gonna ask you questions okay this one's much better I think I took this picture I think I grabbed the other one from the web okay okay in the chat tell me what this is for okay theill for those that answered you got it correct Scala Scala spiral ganglion or you can call it CIA ganglion I accept both okay oh you said both yeah I I think spiral is easier to spell because I thought I'm um I did C G and then I said oh maybe you would prefer okay either CG or SG now on the test you got to spell them out oh I thought I'm kidding so what is that membrane that two scal oops sorry so what is the membrane label two for okay so for those that answered vestibular membrane is correct what is this space anyone G to get fancy and give me the other name that's not in your book Julie getting a fancy on me okay Coke duct R Scala media what is this membrane down here okay good job Bas solar membrane what is this membrane this where this okay good job tectorial okay and then I'm going to put um six and seven together just answer them as separate though lines so don't write them put six the answer seven the answer for okay six is Scala vestibuli seven is Scala tempani and then our last area it sits on the basar membrane sits on the Bas solar membrane okay spiral organ or you can use organ of cor te so that is the last model for the ear what I'm going to do is it won't be till late tonight but I'll get y'all a video recording of the brain and I'll go over the model and the dissection basically what I'm going to do and you can follow along with the video is you can use the you can use this brain lab Direct ctions whichever one that you like PowerPoint PDF same same file just different format you can use either one of these to follow the lecture because that's what I'm going to use to go over the material so I'll have that for y'all probably real late tonight it'll be posted and then y'all know how to get a hold of me if you need anything message me on teams email me and I won't see y'all again but I will be around if y'all have any questions your final for this class is just test four it opens Sunday closes Monday absolutely no extensions because I have to get your grades in otherwise you can't move on to turn B okay yes ma'am um I have something to show you okay let me stop recording