that's the entire process from start to finish this spermatogenesis now the process that goes from here to here going from spermatid to sperm is called dermiogenesis and then the release of sperm the release of sperm bites are totally cells into the Lumen of the hollow interior of the seminiferous tubules it's called spermiation okay so there are one two three four five different terms uh uh different types of Celsius for matagonium primary spermatocyte secondaries spermatocytes spermatids and then the mature sperm cells there's spermatocytes and there are three processes dermatogenesis is the whole shebang spermiogenesis is just the maturation of spermatids into sperm and spermiation is the release of sperm by the sertoli cells into the luminum seminiferous tubules okay now the um male female let's go that way okay female is X x in terms of the sex chromosomes the male is X Y okay so half of the sperm will have an X chromosome and half will have a y we start off with um here we have x x y y and then 2 will be xx and 2 will be y y or I'm sorry we start with an x y and then here we have the x x y y and then in x x and one a YY on the other and then oh and wait a second I did that wrong sorry I did it in the mitosis instead of meiosis sorry all right so each of these guides um have um an X and A Y so then this guy is going to have x x y y this guy's going to have x x this guy will have y y and then x x y y so it is the sperm and the sperm alone that determines the sex or the baby the female can only give an X the sex of the baby determinant is determined if male gives an X and then you have x x that would be a woman or the male gives a y and then you would have x y and that would be a y and a half of the sperm are going to have an X half of the sperm are going to have a y so there's um every time you make us make sperm cells half of them will have X and half will have y so you should have a fairly equivalent chance of producing a boy or a girl but each child's an individual event so it's probably a 50 50. it doesn't mean if you have three boys now you're going to have three girls or anything like that okay all right so with females it's similar to this except with females we would be talking about instead of spermatogonium these would be Oregonian which means egg and then you already have all your primary oocytes when you're a fetus all right you go through all that happens and then it arrests and then it it picks up again when you go through puberty and in females this is going to be a polar body because you got to get rid of half of that DNA and then this would be the second polar body so you would not make any of these and you'd end up with one egg all right we dump the extra DNA as polar bodies and we'll talk more about that when we get to the female reproductive system but [Music] um the idea there is to end up with one egg instead of one egg instead of um four because otherwise every time you got pregnant we'd have quadruplets and he would want that nobody all right so these are the little spermatids and then he changes back to another bone and everything all right all right I'm going to hesitate for a second in case anyone might picture this and I want to talk about one more thing before I move back to the PowerPoint and that thing is um the fluids that are secreted so