The Reproductive Syste4

The Reproductive Syste4 - it degenerates. Uterine Tubes o...

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The Reproductive System Female Reproductive System Ovaries o The ovaries are covered by the visceral peritoneum. o Follicles consist of an oocyte surrounded by granulosa cells and a thecal layer. o As follicles mature in response to FSH they enlarge, an antrum forms, and the oocyte increases in size. Granulosa cells form a cumulus layer that surrounds the oocyte, and a zona pellucida (a thin noncellular layer) forms around the oocyte. o About the time of ovulation the first meiotic division is completed. o Ovulation is the release of the oocyte from the ovary. In response to LH the follicle completes its growth and ruptures, and the oocyte is released from the ovary. The second meiotic division is completed when the oocyte unites with a sperm cell to form a zygote. o Fate of the follicle. o The ovulated follicle becomes the corpus luteum. o If fertilization occurs, the corpus luteum persists. If there is no fertilization,
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Unformatted text preview: it degenerates. Uterine Tubes o The uterine tubes transport the oocyte or zygote from the ovary to the uterus. o The ovarian end of the uterine tube is surrounded by fimbriae. o Cilia on the fimbriae move the oocyte into the uterine tube. o Fertilization usually occurs in the upper part of the uterine tube. Uterus o The uterus is a pear-shaped organ. The uterine cavity and the cervical canal are the spaces formed by the uterus. o The wall of the uterus consists of the perimetrium or serous layer, the myometrium (smooth muscle), and the endometrium. Vagina o The vagina connects the uterus (cervix) to the vestibule. o The vagina consists of a layer of smooth muscle and an inner lining of moist stratified squamous epithelium. o The hymen covers the vestibular opening of the vagina....
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