hi everyone welcome to sixth seventh and 8th Channel by juice I'm your teacher Ankita and I welcome you in today's class how are you all good evening everyone good evening so good to see that all of you are here welcome to the class everyone I hope that all of you are in a good health and I hope that all of you are excited for today's class so we have something really very cute today Aisha priyaganshu Jonathan Ayan DeVille good evening everyone good evening yes how are you all all good are you excited for this session I hope that you can see me clearly and and I hope that you can hear me clearly yes awesome everyone so in today's session we will be discussing about the reproduction right it's a very very important chapter from the exam point of view and uh this polio Chaplet is important for you future studies also right now in this particular chapter we will be discussing about the reproduction you will be learning more about it in your higher classes but we have something very very interesting in today's class yes this is for class eight right but if you are in class six or seventh you can still be here and can learn about the concept yes I know Aisha I have more cuter picture of the dogs so basically we're talking about the animals right and uh we're talking like of course we have a very cute picture of a dog here we have something more cuter than this see over here I'm sure you have seen this picture yes yes right yeah yeah this would this would be my position here we can move me a little bit yes yes so yeah I was just thinking about the dogs and I thought yeah why not let me have yes yes it's my yeah yes her name is Sia her name is Sia yes so why we have these cute pictures of the dogs over here right they're very very cute and you know of course they're very adorable they're very um they're best friends right of humans and uh we all love dogs right that's very good yukta very good hi palash welcome to the class yes Sasha it's my dog yes her name is Sia yes oh you have a cat I'm sure when we have a pet around us we all feel good about it right and we enjoy our time and we are very very happy when they're around right yes in your chat box yes I saw that and acknowledging you over here yes so now we are discussing something about the reproduction right and we are discussing about the pets so we have more dogs over here okay now coming back to a very very important point right now we know that every organisms actually produce the offsprings right I'm sure my God you have four dogs at your home that's you're very lucky you're very lucky sorry yes hi okay everyone so I'm sure around yours right I'm sure around you I'm you must have seen different animals plants they always produce right their next Generation I'm sure all of them have seen that yes or no everyone come on come on yes ha please do not again a very important thing everyone let's do please don't spam you might get a time out okay yes very good right plants also reproduce animals also reproduce and of course different organisms that we have on a planet all reproduce we can say that reproduction is a very important characteristic features of the living organism yes from microorganism to the biggest animals that we have on a planet Earth we we will see that there's a reproduction happening yes hey Luca um is here yes okay everyone so are we clear with all of this right I'm good I'm good everyone see you again let me just have all of your attention back I think I think many of you have joined just now welcome to the class everyone welcome to the class yes Mom has other shoots my mom just left yes yeah man will be coming with a class but Mom has a very important class now right so Mom just left over here I yeah ma'am will definitely will be able to read your uh comments and I'll say hi from your side now everyone what are we doing today what are we studying today we are discussing about the reproduction right and we are discussing reproduction that is a very important characteristic features that we see happening in all the living organisms be it the microorganism be it the very big animals right so what we understand by the reproduction yes Ashraf we will have that no you're right on time Hershel right on time so tell me everyone according to you what should be the definition of reproduction or what is reproduction thank you gory I'm good I hope that you're also doing good hello hello hi pradeep and everyone come on everyone let me let us Focus over here yes tell me everyone what reproduction is like in very basic term what will be the definition of it making copies okay the process of producing babies or young ones continuation of the species yes very good yes Anita very good vedant yes kamlesh yes rangoli making copies of themselves very good Rakesh very good gun gun so we have an understanding right let's talk about the reproduction mode so we know that that reproduction is a process for producing offspring that are biologically or genetically similar to the parent organism right so we know that in the reproduction the parent will be producing either a identical copies or exact same copy or a similar copy of themselves like the humans when they reproduce of course we have the small babies and all of her right when we look at ourselves we are very similar to our parents we are not identical to our parents but we are very similar to our parents now we are produced by the process of reproduction right and it actually helps in the continuation of the species what do you think everyone clear Rakesh we will be discussing about that but in a bit yes it is very essential it's a very essential process for the continuation of the species it actually help us to survive yes very good Gayatri right on time we have just started okay everyone so I hope that all of you are clear with what is reproduction is yes very good very good right now recently I'm sure you have read in the news that the population of a planet Earth have reached 8 billion yes or no so many humans are planet Earth yes harshad offspring are the children right the Next Generation we call it as The Offspring right so we will be reaching or we've actually reached 8 billion which is a huge number and of course this is because of the reproduction right it's a result of the reproduction so now now that we are clear about reproduction is let's take a look over here at the importance of reproduction reproduction actually help in the continuation of the species if there's near if there's no reproduction what will happen if there's no reproduction of course we know that right the specie would completely go vanish right we'll see that the species will extinct yes so now we are clear that why the reproduction is important right everyone are we clear so it is very important for the for the continuation of the species to protect the species from the existing right they should not be getting extinct for they are existing they should reproduce very good so I'll be clear about this everyone it's a two marks question that write the importance of the reproduction and here we have are we clear yes crystal clear that's nice very good nanduri so I hope that all of you are paying attention awesome everyone so we have just one hour we have to finish this whole chapter I need your support right and we'll be covering each and every Point don't worry if the screen is blurred refresh your page awesome very good everyone now let's talk about the different types of reproduction so reproduction broadly can be categorized into two different categories we have asexual reproduction that involves only one single parent this is very important to everyone super important everyone please do pay attention here asexual reproduction only one parent is involved there are no gametes formed and fission happens okay these are the important points that we will remember about this yes it happens nandri no worries over here we'll discuss Horace Imran just give me a minute we'll discuss about that also are we clear yes very good yes so there are three important points remember in the asexual production only one single parent is involved gametes are not involved gametes are nothing but the germ cells right like sperm and the over they're not involved there's no fertilization and it happens with the help of a fusion we'll discuss about it right what is efficient over here we'll discuss about it then of course we have sexual reproduction now sexual reproduction may we have two parents involved gametes are involved and we'll see the fusion okay how many of you have heard about the Fusion Dance tell me everyone how many of you heard about Fusion dance oh you know what in my school we will have a Fusion dance performance or maybe I am performing a Fusion Dance yes Fusion word we usually use when we are talking about something which is getting mixed right a fusion of two things right a fusion of two things right I'm sure there are a lot of covers that we have Fusion of you know English song or a Hindi song together and it has a very nice beats and people do dance and of course I'm sure you heard about it yes fusion fusion means mixing what does mean it means mixing whereas fission right whereas the word fission f i s s i o and fission means splitting clear everyone it means to split there are two important things Fusion means mixing and fishing is to split or to divide very good vedant so we are clear with this right so an ace actually to production will see splitting whereas in the sexual reproduction we will see the fusion mixing of this right clear everyone very very good right now that we are clear over here let's talk about the gametes I see that few of you have doubt with the word gimmeat now gay meets for all of us to remember that they are the germ cell they are the germ cell okay or we can call them as the reproductory cells also reproductive cells also okay we can call them as a reproductive cells can you look over here everyone yes we can call them as a reproductive cells also now they are the one right we have two types over here we have sperm and we have the ovum sperms are present in the male right basically spoons we have in males they are the male gametes and worm or over or the egg is there in female everyone are we clear with this bye bye bye ashif okay are we clear yes very good so what are gametes gametes are also called as germ cellular reproductive cells in males we have the sperms and in females we call it as a overm over or egg very good now everyone let's take a deeper look at the asexual reproduction now it's a two marks question and this the same thing we'll be learning in your 10th standard also so why not pay attention now and learn it forever yes vedant I hope that now you are clear okay now asexual reproduction we have these points so here we have so a difference question can come in your Examination for two or three marks make sure you remember this take a screenshot everyone super important what is the difference between asexual reproduction and sexual reproduction Simple Thing very good now let's take a look at the amoebaka reproduction reproduce by using the very very very simple method of binary fission now binary fission means splitting of the cell into two here we have a parent cell I'm sure you can see right extreme you can see there is a parent cell slowly slowly what will happen we'll see the nucleus getting divided first we can see nucleus is dividing following it follow it by the cytoplasmic division but a nucleus is dividing then the cytoplasm will divide and eventually we have two daughter cells just by simple splitting amoeba will be producing two daughter cells and these will be identical right can you see they'll be exact copy of their parents they'll have nothing different clear everyone yes so in asexual reproduction there is only one single parent involved yes there are no gametes right we don't see any gametes and there's a fission no Fusion there's a fission clear everyone remember this diagram they will be asking you to draw this diagram also in the examination yes what will happen if the parent cell will die of course if the parent cell is not of alive one of course if there's one organism is not right it's not alive that will not be able to reproduce right yes harshit will discuss about it give me a minute yes very good budding is also an example for it and talking about the birding we have the burning over here yes Shruti what is not clear to write it in the uh you know chat box I'll be able to help you with that so what is a budding budding is nothing but another type of a asexual reproduction whereas only one single parent is involved right in the budding what we'll see we'll see that there's a growth of Bud right can we see a tiny little bird is growing like like this Hydra is an organism a very a very small organ it's a microscopic organism we have yes right so we'll see this bud and it will slowly slowly grow and once it has matured right it is very strong in many when it's kind of a mature it will detach itself from the parent's body and it will stick on a surface and of course it will become a new individual okay clear everyone yes vedant you're absolutely correct can you write your question again I think I've missed it yes ah very good East is also right we'll see there is uh budding in East also yes Azad and I will I will huh the parents will live okay yep the potato bird is different from this bird okay budding and explaining okay so here everyone we are looking for the uh very interesting we were looking at the asexual reproduction which is budding right now in budding what we'll see we will see that we have we have organism right over here a parent organism totally slowly budding will see a growth of Bud okay we'll see a growth of Bud and the bird will get matured either when it's getting food right it'll get mature and one it's completely mature it will get detached from the parent's body and it's a new individual clear what is the definition of binary efficient so in the binary fission what you can write that during the binary fission we will see that there's a formation of two daughter cells okay from one single parent and identical copies will be formed very good yes clear everyone are we clear with this very very good yes so we have a binary deficient other example we have we can see in the Lesh Mania yes guys we have answered your question very good in the water dhanushree in the water okay now everyone moving ahead we have a very interesting story how many of you have heard about the story of the dolly sheep tell me notes we will be discussing about it about the Frog we will discuss about it I'm sure all of you have heard right in your textbook also is mentioned right in your textbook you have this thing the story of a dolly sheep so dolly was formed right but it the process was very different it was not a natural process there were other involvement of the humans yes right it's okay if you haven't heard now we are discussing so dolly was the first sheep right it was kind of a clone it was The Identical copy so what happened I'll I'm explaining you everyone please pay attention and then I'll be taking your doubts so we have this we have one sheep right over here right so from one sheep we took the cell okay can you see over here from one sheep we took the cell and from the other sheep it took the egg the nucleus basically clear everyone I'll be clear I'm sure all of you remember the cell in the nucleus raise your hand we know that the genetic information the genetic material is present in the DNA which is there in the nucleus right clear to tell me we will now be clear yes very good very good okay so what we saw that we have the cell right we we took the cell right we took actually two cells one from the body right and we took the nucleus of the other cell now of course we added over here and we had a foster mother and what happened there we basically saw that the dolly was a clone which was the exact copy of the from where we got the nucleus right we saw that it was the exact copy of it yes are we clear everyone with this yes yes are we clear everyone first take a screenshot of this and then we'll explain again it's a very important thing take a screenshot in your textbooks also they have mentioned this yes very good okay yes I'm explaining again so so they were so Dolly has two mothers basically okay very good so what we actually took one we just took the cell and not the nucleus other cells means right from the body right and of course the nucleus was removed okay clear right yes I'm explaining everyone please pay attention now everyone full focus and then I will be answering your doubt right okay so the other cells are of the memory glands basically who has a nucleus see over here everyone we have the cell right these are the stomatic cell from the body they they remove the nucleus out of it so nucleus is not there nucleus came from the another sheep okay right and we know that in the nucleus what we have we have the genetic material right so once that was a case we saw that when the fusion was done when we added the nucleus into the cell and of course the embryo was formed and eventually it was added into a foster mother we have the dolly which was the exact copy of its mother are we clear everyone see we all I'm sure all of us have heard about the uh clones right so clones are formed where they are the exact copy Anita I don't know where you're saying flea cells over here we have the egg cell right Foster means surrogate a mother who is just carrying the embryo they are the memory gland cells okay yes got it very good see in simple language if I say two cells they took one cell they took and they just removed the nucleus of it from the another cell that took the nucleus and then they removed the cell harshit other cells are from the memory glands of the Sheep okay they're the stomatic cells basically very good now everyone answer this question Fusion of gametes happened during fusion fusion happens during what so Mahesh the process of you know removing the nucleus out of the cell is done in a lab very good everyone the correct answer is the fusion of the gametes happens during the sexual reproduction are we cleared up to here yes are we clear very good very good ah yeah we don't have a poem now but for the next question we'll have it yes clear right I hope that there are no doubts till now it's very easy right and we just have half an hour everyone we have to see one nucleus from and yes you're absolutely correct yes no doubts right okay everyone now you tell me how many of you heard this thing you know what you are very similar to your father or you know you have your nose like your grandfather or your hairs look like your mother or your eyes look like you know uh your grandmom right we all have heard about these things and people will be telling us now this is because of the sexual reproduction we know that from our parents we get their genetic material right we get the characteristics from both our parents so sexual reproduction occurs by the fusion or the specialized reproductive cells from male and female and we call them as sex cells or the gametes or the germ cell okay I know curly hairs for my father that happens right so here we have everyone so we are talking about the gametes right we know that we call them as reproductive cells also we call them as The Germ cells also and the sex cells also these are actually the one that will be giving us different characteristic features right you and I have a lot of similar similarities with the parents it's because of that their genes came to us right yes because we'll see the mixing of it okay tell me everyone let's suppose let's suppose um let's suppose we have right let's suppose we have two jars right let's suppose we have two jars right let's suppose in one water uh in one we have added a little bit about the water and in one we have let's say few colors right when we mix it what we'll have we have a colored water yes colored water will have right similarly basically we got the characteristic features of both of these yes so that's how the reproduction work okay everyone are we clear very good yes we'll be discussing about it in a minute in a minute so what we know now over here that reproduction is a fusion process where we'll see the mixing of the gametes right the genetic material will be getting mixed now you're asking few doubts over here what is DNA everyone let me quickly go back and then only we'll move ahead what is DNA DNA is deoxyribonucleic acid right and DNA is present inside the nucleus nucleus half chromosomes I can see some of your past what are chromosomes now in this DNA right which is a double helical structure when this is completely coiled and packed and it will form the chromosome are we clear right the condensed form the condensed form of the DNA compactly packed the nucleus we call them as the chromosomes clear yes very good and DNA have these small small fragments right okay this small fragment we call them as genes we have genes right Rakesh for example my hair color is black right my hair color is black so the gene of my hair color is right the gene that I got is present on the DNA are we clear everyone so there are few things you have to remember your eye color your skin color your hair color is because of the jeans right is because of the jeans clear everyone awesome now let me explain you I can see there are still some doubts okay everyone let's focus over here we have DNA right DNS present in come on DNA is present in where DNA is present in the nucleus it's very long right it has to pack properly to pack it properly the DNA has to condense it is very in a very Coral form so when the DNA is in a coil form like this right we call it as chromatin during the cell division you know what these chromatin will come together and they'll form this beautiful structure that we can see and I'm sure you must have seen in your textbooks and somewhere these are the chromosome what we call them as we call them as chromosomes clear everyone now though I'm sure all of you are clear yes chromatin we have DNA we have chromatin and the chromosome okay and on our DNA we have small fragments which we call it as genes and they will give us the characteristic features hair color skin color eye color Etc chromosomes are made up of DNA only now they are the one that we will able to see during the cell division and of course they move from one generation to the Next Generation see can I tell you for example you are in eighth class right let's suppose your name is shraddha in when you are very small your name was shraddha but as you're growing maybe your name will change maybe your parents will call you by the some other name your friends will call you by other name but you will remain right the the characteristic features that you have will remain same yes that's the case with these though the DNA is at a different different stage called by different names but content the same here Cleo hello everyone I can see many people just join us now if you're new here don't worry you can watch the video from the back don't worry you can watch it from now itself we'll be starting with a sexual reproduction and if you're new here please do hit the like button and subscribe to the channel no issues no issues Shreya okay manjeet yeah now that you have mentioned I'll call you manjeet okay okay everyone now we will be discussing about the sexual reproduction in humans everyone Focus now human we have two types right like when we talk about the reproduction we have two two types we have asexual reproduction and sexual reproduction now we will be looking into the sexual reproduction and first we are discussing with the sexual reproduction and males everyone are we ready I want for the focus in the class and I can see right many of you are talking see again please make sure all of you are paying attention here okay now let's talk about the male reproductive system so what we have over here though is a male reproductive system first we'll discuss over here about the importance and then we'll discuss ahead yes so we know that in the male reproductive system the primary organ of which actually help with the production of the sperm is the testers right testis is the organ which is present outside the body in the male right in the scrotum and it is present outside so that it can maintain the temperature air testers will see the production of sperm a one marks question everyone remember this right intestine sperms are produced this is very very important then from the testes it will move to the sperm duct in your textbook they have mentioned sperm duct it is also called as vas deference okay so over here we have the spawned up so from the testers it will move to the epididymis and from there it will move to the sperm duct from there to the urethra and then out to the penis very very important everyone yes sperm is a male gamete absolutely correct yes okay now in between there are two important glands that we have that actually help in providing the nutrition and the lubrication for the sperms to move in the male Liberty system and in the female reproductive system are we clear obviously just you just have to remember three important names which is mentioned in your textbook you have to remember of the testes right penis urethra and these sperm duct clear in males there's only one duct there's only one tube that actually carries a sperm and the Yuri can you see this tube over here everyone the yellow one that I'm uh you know just colored it can you see this this is the bladder you don't need bladder right which actually stores the urine so in males there's only one duct that will be carrying the urine and the sperm clear everyone so in the examination they can ask you to mention about the three important parts of the male reproductive system and their function it's okay Amrita welcome to the class Cleo then of course they can ask you about the sperm which is a male gamete so this is how the sperm looks okay it has a head middle piece and a tail so in the head it has the nucleus right which have the genetic material the middle piece have the mitochondria that actually help the sperms to move provide the energy and to move then of course we have the tail which moves and actually help in the movement of the sperm clear see everyone I'll be clear very good very good so they're very very small they're produced in the testicles right and they have these three important parts yes yes Padmini mitochondria is present in the Middle East it provides us the these it provides the sperms the energy to move forward clear very good very good so we are kind of done with the male reproductive system right we know that in a reproductive system the primary organist test is it is where the sperms are produced then uh from the sperm duct which will be which is attached to the epididymis which is on the tap on the top of the testis will carry the sperms to the urethra right and then it will moving out of the body yes Amrita okay let's move ahead everyone now I'll be discussing about the female reproductive system here we have the female reproductive system so in female reproductive system we have four major parts we have ovary OV duct urethra and the vagina now ovaries of course is where we'll see the production of ovum which is a female gamete okay uh produce in testicles there are two right testicles basically that's why we say like that yes I will be discussing about that yes very good so in ovaries we'll see the production of the ovum right then over duct is also called as the fallopian tube clear is also called as a fallopian tube so yes Amrita pay attention we are discussing over here now Okay so the other name of OVI that is fallopian tube so from the ovary the egg will move to the fallopian tube or the OV duct then it will move to the uterus right and of course the baby will grow in the uterus itself okay this is important if the fertilization is happening we'll see that the growth of the baby will occur or the embryo will go grow vaginas also called as the birth canal through vagina only the sperms will be entering into the female reproductive system clear everyone yes so these are four very very important parts it's a very easy part we have oviduct which is called as a fallopian tube right then we have the ovaries which actually produce the ovum the male sorry the female gamete then we have the uterus where of course we'll see the uh growth or the you know development of the embryo and vagina through which of course these sperms will be entering the female reproductive system there's one more part over here which is called as a cervix right it will allow the sperms to enter into the female reproductive system yes Aisha yes okay are we clear everyone Gayatri have just mentioned much cervix is over here clear clear clear so ban the primary all from the female of huh yes sir yes it's the ovary mayank I will look at the doubt watching one minute what is the doubt I'll talk about it please just give me one minute mayank about the chromosome I'll talk education only one minute we'll go over there okay here everyone we have the female gamete right which is the ovum can you see over here it's the ovum it's a female reproductive it's a female reproductive cell right producing the ovaries and contains a very big nucleus can we see over here right it's a very big nucleus in females now it's a very a question that you all asked in females we have X and X chromosome okay we have a number of chromosomes right in humans we have 23 pair of chromosome okay clear out of that one pair is sex chromosome female has X and X chromosome and male have X and Y chromosome clear very good you know this very good very good yes awesome everyone so if in a females we have X and X chromosome and in a male we have X and Y chromosome yes okay everyone now let's move ahead let's see this question and then we'll be discussing about the hen okay which of the gametes is non-motile okay tell me everyone which of these is non-motile we have male female both a and b or none which gami does not move basically yes it's a very easy question right yes very good so the female gametes non-motile basically it does not move right it does not it doesn't move and we got it okay now let's talk about the fertilization so till now we have discussed that in females ovary is producing the over right and in the oviduct the oven will move now let's understand this what is fertilization everyone over here if you see can you see these small dots right that are moving towards the egg up over there now fertilization is nothing but the fusion of male and female gamete fun which I thought I'll explain you once uh you need to stop swimming we'll come over there give me a minute mortal means moving absolutely correct yes what we see over here is the fertilization fertilization is nothing but the fusion of male and the female gamete is called as fertilization yes motile means it will move non-motile means it will not move okay very good very good okay so are we clear what is fertilization and here for all of you who have still some confusion please look over here Fusion is nothing but the spur is the fusion of the sperm and the ovum it is called as the fertilization and nuclei of sperm and the nuclear over fuses to form the zygote okay this is important everyone and zygote is a single cell say single cell which is formed after the fertilization now many of you will have a doubt on the ma'am what is a zygote and what is an embryo so after the fertilization the Single Cell which is formed is called as zygote okay yes please ask your doubt yes please ask it out yes very good very good I know I know mom do eggs lay hen lay eggs we will discuss about it so please don't spam we will discuss about it see over here this is the Overman this is the spur okay this is the sperm and this is the over or the over clear everyone will be tackling this topic in some other class not today nandini got it please don't spam nilakshi we will not be discussing about the triples and twins in today's class in future we'll have a separate class for that very good very good are we clear everyone clear very good so with this we are done with this topic there was a little bit more that you need on this particular slide right so I think there was a few of you who was asking about this so here we have the female gamete which is an over it has a nucleus and the cytoplasm okay and female reproductive system have over right which is produced in the ovary right ovary is a very important part very important primary organ then we have OV duct right which is also called as fallopian tube and we have uterus where we'll see the growth of the fetus and then of course we have the vagina through where these perms will enter into the female reproductive system very good very good yes thank you Aisha everyone I hope that you have hit the like button for the video everyone quickly hit the like button for the video asexual reproduction happens only with a single parent there's no future involved and usually they'll form the identical copies cervix of course above the vagina there's a place from where these spawns will be entering into the uterus very good everyone so we are done with this part no can can I ask you a question yes please don't spam everyone come on very good everyone hit the like button and if you're new here please do take a movement and subscribe to the channel nice very good okay okay how does the embryo develop inside the female body what do you think everyone fertilization only one over whistle released yes yes in female right only one egg is released every month when we're discussing about that one minute very good mahesha yes it's okay it's okay Amrita not at your point zygote is a single cell that is formed out of the fertilization very good very good so how does the embryo develop inside the female's body we know that it happens with the health of of course it's there inside the female reproductive system right and what it has it has a uterus right and uterus provides one minute okay this is getting a little bit hang over here huh so see over here after the fertilization which is nothing but the fusion of male and female gamete you can see there's a formation of zygote everyone are we clear what is this I got then we will discuss that we're just coming on that everyone are we clear what is a zygote zygote is firm after the fusion of male and female gamete very good now this is a single cell right it's just a single cell now cell divide right cell divide now this one single cell will divide into two cell stage then four then eight then sixteen and at 32 cell stage it will actually go and get attached in the uterus right it will get attached in the uterus and the uterus has a thick lining of blood right that is actually there to help the growing fetus or growing embryo right it will be providing the nourishment Cleo yes very good it will divide rapidly and it will reach up to a stage of blastila very good avni yes sales divided means the number of cells will be increasing from 1 to 2 2 to 4. very good pradeep yes Amrita will be discussing about it yeah please ask your doubt ha it will attach on which side that depends right yes okay Aditi right everyone so I hope that this is clear the development of the embryo will see and this is how the features will be developing into the mother's body right here we have an unborn baby is there that will be developing more and more and of course it will be getting the nutrition from the mother's body only clear everyone see write the number of cells will be keep on dividing and slowly slowly we'll see that the fetus will develop right over here we have a very important organ so you will be learning more about a new higher classes right and they get all the nutrients by the help of the very important organ which is there which is called as a placenta now placenta provides the nutrition basically it is a attachment between the mother and the fetus right and it provides a nutrition and carries a waste from the baby from the growing fetus to the mother and get all the nutrient from the mother to the fetus very good Gayatri fetus means the bigger stage of the embryo right which is growing inside the mother's body we call it as a fetus we don't call it as a baby we call it as baby once it is delivered outside okay but oh but placenta is a very important organ which provide the nutrition X and chromosome yes but they will have both the chromosome X and Y chromosome very good everyone okay now coming to a very important part of the hen right see we're talking about the hand right yes so hen actually lay eggs right so inside the hen what we have basically we they reproduce right and of course they lay the egg right and of course inside the egg only we'll see the growth and hen will sit on the end to provide the warmth and we will see that slowly slowly we'll have the cute chick come out of it yes so Hand May what we know that right the organisms that actually lay eggs right questions no answer to it right and it's a debatable topic yes the organisms which lay egg we call them as the ovary Paris right the other one that lay eggs right animals who lay eggs and the young ones develop after laying the eggs we call them as the ovary Paris very important thing very very important thing clear I hope it's clear to everyone yes yeah we know that yes it does yes anushree yes very good yeah it's a cell that we can see absolutely correct then we have the organisms which give birth to the young ones right like us right so the organisms which actually grow inside the mother's womb is called as the we repair us animals right animals which give birth The Young Ones directly we call them as if every Paris animals are we clear there are two types of organisms that we have one which lay eggs and they're one which does not lay eggs yes I have to finish the class everyone so please let's focus over here yes sexual reproduction my hair should sexual reproduction everyone are we clear can we see the nucleus of the hen egg microscope we can clear everyone are we clear come on come on very good very good Mahesh can you write your question properly or what is a doubt asexual reproduction Subhash is a type of sexual uh is a type of reproduction where only one single parent is involved yes very good so we have two types of animal we have every pair of animals which give birth to the young ones and we have ovary various animals which actually lay the eggs yes frog is animal because they lay eggs right uh I think lot can happen this class will not be able to help us in understanding that and we don't have that much time for me to explain you don't worry you can write your question in the comment section I'll answer there so let's talk about something really very important over here that there are two types of fertilization we have internal fertilization and external fertilization internal fertilization that means that the fusion the fusion will take place in the female reproductive system only okay we'll see the fusion happening in the female body and we will see that it usually takes place in the terrestrial animals yes um everyone are we clear with this inside the body we will call it as an internal fertilization we see in the dogs cats humans the external fertilization means that the fusion of the male and the female gamete will be happening outside the body are we clear it takes place outside the body of the female that's why it's called as the external fertilization clear yes very good very good we'll just discuss now clear right everyone now let's discuss about the external fertilization so you may hear we have the female and over here we have the main so what will happen we know that frog are the amphibians right frog are the amphibians over here sorry are you'll not be able to see this frog are the amphibians and they release their egg and the sperm in the water itself and then they will fertilize in the outside only yes and once they will fertilize they'll form the zygote clear so the fertilization is happening externally so the female will be laying many number of eggs right yes and we will see the fertilization happening there is the external fertilization yes and then of course let's quickly talk about the life cycle of frog right so we have the fertilizer these fertilized egg well actually are being there they are actually present in the back of the Frog right they will actually develop into a small larva we have early tadpoles they'll get more mature we have a young frog and eventually we'll have a adult frog clear yes my young we can say that yes there are also example of the external fertilization harsh we can see the external fertilization in humans if you're talking about the IVF treatment where the sperm and the overm are fused outside the body for female in the lab condition right very good everyone are we clear yes right this is very very important and the life cycle of frog is very important and what we call it as the I'm sure we call it a z come on everyone I'm sure you know the answer very good very good now let's talk about the metamorphosis right let's talk about the metamorphosis so we're talking about the butterfly over here and I'm sure all of us have seen that there are different stages of it drastic change very good very good no Aditya not ignoring you but can't understand the question that you're asking if you can repeat that that will be great I know yes so they have a jelly substance which is you know which is there to protect the growing uh embryo that are there in the egg yes very good so we have this butterfly it will be laying its egg right and what we'll see we'll see that slowly slowly of course these will develop into a larva and this Laura will be eating so much food right it will become a little bit more and then of course we'll see the Cocoon stage and eventually see the Cocoon stage over here they'll just stay there for a very long time and then of course they will become a butterfly so this whole process the transformation of The larva into an adult involving a sudden or a series of continuous change in the body of an animal during the life cycle is called as the metamorphosis okay what are the drastic changes Gayatri means sudden changes right from a small single cell they'll become like they'll become an organism of multiple cells and we'll see the different changes happening in their in their life cycle so that whole process is called as the metamorphosis are we clear I can see that there was someone who said that didn't get it but I hope now you are clear with it yes everyone are we clear with this hello everyone I hope that you're paying attention yes very good very good so again I'm repeating metamorphosis is a very important process which happens in the organism yes priyanshu explaining you again so bedroom offices is a process where of course we'll see the transformation happening from a small single cell right we'll see the different stages of the animal like if you talk about the butterfly from our air they will see The larva Lara will again grow more then we'll see the Cocoon stage and then finally a butterfly so we have different stages in each of these stages we'll see drastic changes sudden changes and that's how the organism will grow we call all of it as the metamorphosis this process is called as metamorphosis it happens of course we have talked about the Frog also clear awesome clear clear now let's talk about the importance of the eggs right so we know that eggs of the animals like frog does not have a hard shell like hand cells right hand egg they have a layer of you know they have a layer of jelly that will be holding it together provide the protection to the egg they're exposed to the fishes that's why they have to produce n number of cells yes and of course more number of cells are produced for the higher probability or they can save more yes uh mantesha so it is actually a fluid which is present in the uh in the uterus basically where the baby is growing right not in the uterus exactly in the where the baby is growing it is surrounding by that fluid amnion okay amniotic fluid we have it's a layer that is formed right inside that we have the fluid yes very good pradeep oh sorry I think Aditi uh vas difference is also called as a sperm duct that will be carrying the uh sperms from the testers to the urethra yes thank you so much Amrita harsh semen is the mixture of the lubrication the fluid and the sperms what will happen if the egg is not fertilized in the female will see the menstrual cycle yes very good very good I hope that everyone this is clear it's have this question everyone which of the following is the baby Paris animal quickly everyone which of these actually produce the young ones yes yes I remember your name you're testing my knowledge nice yes we will be having that chapter also you have that chapter in the upcoming weeks we will be making sure that we have that chapter okay the correct answer is Dolphin right the correct answer is dolphin yes very good so in your in your uh in your textbook we haven't discussed about much about the menstrual cycle right but if the fertilization is not happening what will happen in the female body right every month there's one egg which is produced so if it's not fertilized what will happen the uterus will lose the lining that it has right and we'll have the menstrual cycle clear everyone I hope that it's clear exposed uh means it's open right harshith it's open for example if if frog is laying their eggs and the sperm in the water they're exposed right they are open in the water fish can come and attack them right and they can get destroyed easily so are we bigger repairs animals are those animals that actually give birth to the young ones very good keshav sir Rick's is present above the vagina which actually allow the sperms to enter into the uterus Shreya drastic change means major changes in the body of the individual very good everyone so with this I think we have finished our chapter yes and let's quickly have a summary everyone so we have discussed reproduction is nothing but a process of producing offspring that are biologically or genetically similar to the parents there are two types we have a sexually production and sexual reproduction asexual reproduction means that only single parent is involved no gametes are formed and the parents will the daughters or sorry The Offspring will be the identical copies of the parent we have example of fission which we see in amoeba biodeficion and amoeba budding in Hydra okay yes then we have sexual reproduction we discuss about the male and the female reproductive system sperms are the male germ cell or the male gametes ovum is a female germ cell okay we'll see the fusion of the male and female gamut happening and we've got it as a fertilization after fertilization we'll have the zygote and zygote will go go grow into a fetus then we discussed about the internal and the external fertilization internal fertilization happening inside the female's body and external fertilization happens outside the body of a female animals well actually give birth to the young ones are we clear yes everyone are we clear with this come on come on very good see I'm giving you points by the end of the chapter you should tell me how many points you got yes very good with this we are done and here we have the homework question who was the first test tube baby in India you can write the answer in the comment section below you have a very interesting question so what happens in the hand right that the the eggs that we usually have in the market are not fertilized okay are not fertilized very good very good everyone so please do write the answer in the comment section below that's your homework question and I hope that all of you have registered yourself for this amazing quiz please if you haven't already submit your uh entries and join the quiz and we have this English speaking course please make sure to go in the link check this course out it's a paid course for two months it'll actually help you to improve your English and as we say we have got you covered and I hope that you've hit the like button for the video and do share with your friends and subscribe to our amazing Channel IVF what do you think okay right this is very easy if the IVF stands for the Fertilization in vitro fertilization right fertilization is happening inside the test tube basically that's a meaning of it the full form of it intra in vitro fertilization okay very good everyone what will happen if the eggs are not pretty so the people body harsh if the eggs are not produced in the fume in the female body of course it will not be able to produce the babies right they'll not be able to it's not that right uh if you if the fusion will not happens of course then of course there's no formation of the next generation of The Offspring so it there are times when the egg is not produced in the female reproductive system very good everyone I think with this we I'll end my class nandini it's a topic that we'll be discussing in some other class not in today's class okay very good everyone is very small only yes very very good everyone thank you so much for all the hard work and for paying attention to the class I hope that you've enjoyed this session we will be covering up uh the different parts of this chapter so please make sure to subscribe to the channel and stay tuned to this amazing Channel everyone we'll meet again bye bye everyone and keep on learning with baijus ta-da one minute everyone very important thing that I forgot to tell please uh I will be sharing the notes on the telegram so join the telegram group also now we can say bye bye