Summary of Human Reproduction
- Human Reproduction: Humans reproduce sexually and are viviparous.
- Male Reproductive System: Composed of testes, accessory ducts, glands, and external genitalia.
- Testicular Structure: Each testis contains lobules with seminiferous tubules where spermatogenesis occurs.
- Hormones: Leydig cells produce androgens.
- Female Reproductive System: Comprises ovaries, oviducts, uterus, vagina, and mammary glands.
- Ovarian Function: Ovaries produce ova and hormones.
- Uterine Structure: Uterus has three layers: perimetrium, myometrium, and endometrium.
- Gametogenesis:
- Spermatogenesis: Formation of sperm in males.
- Oogenesis: Formation of ova in females, initiated during embryonic development.
- Menstrual Cycle: Cyclical changes in the ovary and uterus regulated by hormones, with ovulation releasing one ovum per cycle.
- Fertilization: Occurs in the oviduct, leading to the formation of a zygote.
- Pregnancy: Lasts about 9 months, involving embryonic development and parturition.
- Parturition: Induced by hormonal mechanisms, resulting in childbirth.
- Lactation: Mammary glands produce milk post-delivery, essential for newborn nutrition.