01:119:116 Lecture Notes - Lecture 15: Anterior Pituitary, Male Reproductive System, Luteinizing Hormone

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It is thick muscular organl expands during pregnancy. Inner lining of uterus is endometrium; has many blood vessels: neck of uterus (cervix) opens into vagina, vagina is site for penis insertion and sperm deposition during copulation fig 46. 10. In females, more connective tissue and fatty tissue develops: also, mammary glands w/ small sacs of epithelial tissues secrete milk, milk drains into nipples via series of ducts. Oogenesis is development of mature eggs (oocytes: it is prolonged process in human females. If egg not fertilized, degenerates and new follicle matures at next cycle: oogenesis and spermatogenesis processes differ in 3 ways. In spermatogenesis only, all 4 cells produced by meiosis become mature gametes: cytokinesis unequal in oogenesis; 2 polar bodies produced, spermatogenesis occurs throughout adolescence and adulthood. In oogenesis, all mitosis completed before birth; mature gamete production stops by 50: spermatogenesis produces mature sperm from precursor cells in continuous sequence.

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