okay so here's the oogonium and we have the primary oocyte and during fetal development meiosis one began so we have our oligonium we have our um chromosomes at puberty primary oocytes complete meiosis one produces a secondary oocyte and the first polar body the secondary oocyte then goes to meiosis II and it stops at metaphase the sperm fertilizes it it completes meiosis II and it's going to split into it in the ovum and a secondary second polar body and then the sperm in the egg unite again this only happens if fertilization occurs so we looked at what happens in um the process of oogenesis at the same time the follicles are developing so you have follicles the primordial follicles in utero while the the woman is still a fetus and then nothing's going to happen until puberty once puberty happens then the primary follicle is going to become a secondary follicle now during this time the oocyte hasn't continued development yet it's going to start development to a primary oocyte a secondary oocyte excuse me as this process continues okay so this is the oocyte and around it is a little zonapellucida and around that is the um granulosa cells forming the Corona radiata and then we have the antrum that's filled with fluid that helps in the maturation of the oocyte and then ovulation occurs and we have the corpus hemorrhagicum following ovulation um so it ruptures the oocyte ruptures now notice the fallopian or uterine tube is not connected so the oocyte goes out here into the abdominal cavity I should say the pelvic cavity and these little fimbriae or little finger-like projections of the um uterine tube are going to start moving and and create sort of like um almost like a suction kind of thing they're gonna going to try to coax that oocyte into the tube and oops and so what it's going to do is get that oocyte into the tube and then it's going to travel through the tube based on peristalsis as well as cilia this is lined with ciliated cells and the Cilia helped to move the oocyte through so it's a combination of peristalsis as well as this ciliary action that are going to allow it to move through the tube this funnel shaped region at the end so these are fimbriae these funnel shape your region is called the infundibulum and we've had that word before this narrowed region here is the ampulla and this is usually where fertilization occurs and then over here we have another narrowed region immediately prior to entrance into the uterus and this is called the isthmus the um so the fimbriae are going to coax the oocyte and it's going to travel through it'll either be fertilized or not if it is it's going to move into the uterus and plant into the uterine wall if it doesn't then it's just going to degenerate and be expelled or be expelled now over here you can see the ligaments again holding up holding the uterus and the uterine tubes there's a suspensory ligament that attaches to the uterine tube here we have the broad ligament that's going to connect this out to the sides um so these are are both important in helping to hold this in place there's also here you can see is the ureter this is the utero sacral ligament and here is um the uterus the uterine cavity in the vagina so the uterine tubes have three layers they have a mucosa muscularis and a serosa and the job is fimbriae sweep the oocyte into the tube psyllium peristalsis move it along uh the sperm reaches the oocyte and the ampulla and fertilization has to happen within 24 hours after ovulation so there's really a short time period if you consider the amount of time sperm is alive and the amount of time the oocyte is capable of being fertilized very short window of time during which fertilization can occur and then about seven days after ovulation if it's fertilized the zygote reaches the fertilized egg reaches the uterus the goals for lecture six or describe the unanimity of the ovary as well as the urine tube lists the stages of development of the oocyte and the follicle Define graphene follicle primordial follicle ovarian cyst corpus luteum Corpus hemoragicum Corpus albicans primary oocytes secondary oocyte polar body oligonium primary follicle secondary follicle atresia zonapalucida Corona radiata and antrum drop an ovary and uterine tube and label the following fimbriae ampulla is most infundibulum describe ovulation and list the mechanisms of movement of the secondary oocyte through the urine tube