so straining I are going to discuss joints very quickly so what is the joint or an articulation this is where bonds connect or when going to connect with cartilage so you can think of jointers probably the most common joint you think of is the shoulder joint or even the knee joint or the hip joint but there's many different types of joints such as the joints that hold the bones of the skull together or even the joints that hold your teeth inside of your jaw or even the joints that hold your ribs to your stone so there's many different types of joints in the body what we're going to do is classify them according to the space in that joint and also in accordance with how freely moveable that's audience so I'll say that again we're going to classify joints by the size of the space at the joint and also how freely movable that joint means so let's define a couple of terms which we need to use so it's telling it to be aware of is something school philanthropic as in asteroids joint is an immobile joint a joint that cannot move there's also something called an air free product joint and anti drive joint is a joint that can partially smooth so it has a little bit of leeway and then the last type of joint is what's called a diatonic joint and a dialog is a freely movable joint okay so what we need to do is at the end of our table of the government or our classifying joints we're going to say whether these particular joints that we outline cinematic immobile diachronic which is freely mobile or empty arthritis which is partly mobile okay so first thing we need to do is that there were three major three major types of joints that we can draw up first part is something that we call a fibrous joint second type is will be followed I can a cattle and Ernest joint and the last part is what we call so no build up so this is three major types of joints fiber collagenous inside of you let's lift the sign fibrous joints so fibrous joints and joints in which there is no joint cavity so what's a joint cavity a joint counties when you think of those synovial joints so the joint that made for example or the hip or bigger a humeral joint here now is when you have two bones articulating and there's a little cavity which has slowed inside fibrous joints do not have that joint cavity so we can run up noise I'm Italian and that the buttons are connected together to dense regular connective tissue bone is connected with dense regular connective tissue okay what about common instance for collagen storage as well they have no joint cavity and in addition to that is cartilage that connects two bones together so you have had like cartilage connecting two bones together have my cartilage connecting bones okay and the last part of it is a synovial joint and that means that it is a joint cavity and that this joint cavity has a synovial membrane which releases synovial fluid I know your membrane and some of your fluid okay so these are the three major joint classes but of course they have some subdivisions of it so first up a vision of fibrous joints is what we call a suture joint now a suture joint and an example is what you'll find is right here I'll attach these skulls is possible to fold I have a quick look at Frank skull [Music] what will trial is that apart from the whole doesn't put in in order to hold the skull cap on you can see a couple of little suture lines holding the parietal bones together in the frontal bone and the occipital bone which is part of the lower aspect here this is called the sagittal suture and this is a fibrous joint holding those two bones together which of the parietal bone and we can say that suture such as sagittal suture to the sky okay what's another time so we've got suture we also got something called a gum closest gone closest how do we know where this is found well when you sleep gone think of gum gu and because we gone the gong faces joint is simply the joint in which the teeth and secure it in at the jaw so teeth in jewel that's a gum ptosis and then the last type of fibers joint is what we call a thin as motifs and as soon as Moses joint soon as Moses means to bond or to wrap and so this is where you have connective tissue that wraps two bones together to connective tissue your files between the radius and the ulna it's also the connective tissue you'll find holding the tibia to the fibula as well so that we break down so you can say tibia fibula or radius oh that's the type of joint holding those two together okay so they are the fibrous joints let's now move down and look at cartilaginous joints and we'll just separate them out so one type of coverage is joint in a let's go up here I'm going to be two particular types that we're going to look at look at one particular type of cartilaginous joint is a sink and rotis and the other type is a synthesis firstly synchondrosis your remember city got syndesmosis sink and rosie takes both know which one goes where well sink on Kandra Kandra 'this you go to part of a cartilaginous which means I think in Joseph's joint is actually where you find cartilage within bone so the type of typified challenge with invited if you think of the long bones okay you're going to have a what we call a diathesis you know the diagnosis is the shaft but along bone then at either end you have a proximal epiphysis and a distal epiphysis now at the epiphysis there is a line in here which is called the epistle line also known as when you're younger the equipped field plate which we generally refer to as the growth plate this growth plate is made up of hyaline cartilage which helps to secrete obvious material catlantis material is then aquifers into bone and helps to grow the long bone therefore the synchondrosis is the epistle plate which as i said is also just known as the growth plate as cartilage embedded within bones what about a synthesis well there's something that we call the pubic symphysis and the pubic surfaces if we have a look at Frank regretful you'll find that here at the pubis there's a bit of cartilage in between and this cartilage is between this part of the hip and that's what we refer to as thrown at the hip pilot pubis and this is what we call the pubic synthesis okay that finishes the card Lazarus joints I'm sorry about this all downward curve for my writing now on to the synovial joints but what I'm going to do is I want to spend an entire video maybe five or so minutes talking about the Sun over your joint and using Frank as an example to highlight whereabouts you can find the synovial joints okay so what you're going to find that there's a number of some of your joints going from most free to least free or least four into most free regards to that range of motion just remember what you'll find inside of your joint about I know you're counting either the membrane inside of your fluid but let's go back to those terms were talking about before he's seen a strike meaning totally mobile the NVRA being partly local and the diachronic means mohawk so what type of joint disease if you look at a search enjoyed above skull do you think this is not mobile partly my bottom or through tomorrow well it's going to be immobile not my mole at all so you say that what was immobile LLC a stroke so suture joint is sooner our product without it got focus to the teeth in the jaw well you may think yeah a little around a bit you probably shouldn't be able to wiggle around a bit if you're got out - it should be quite strongly stuck in there so this should also be synapse on it what about sin is Moses what about a joint that's holding the tipper that radius and ulna yeah well you can actually move those around so I'll take that that's partly movable which is empty like what about a sink and roses what about coverage between the bone such as that of the pitiful plates well that's not moving at all so that going to be in a sonic and then the last one here the pubic synthesis long is a tiny bit of movement that's available there so you say that that is Antioch College you may be looking at this thing well when do we ever use Diavik diastolic you're going to be saved the synovial joints because I know you'll joints are all freely movable it's just how silly little are they sometimes they move in at one time sometimes they're moving two times from under moving many times and that's what we're going to talk about in the next year