TAILIEUCHUNG - Ch 24: The Reproductive System, Part 2

Gonads = ovaries. Gametes = ova (one/month). Unlike the male, mostly internal. Female repro system must produce gametes AND maintain developing embryo. | Ch 24: The Reproductive System, Part 2 pp 723-747 Gonads = ovaries Gametes = ova (one/month) Unlike the male, mostly internal Female repro system must produce gametes AND maintain developing embryo Overview of Anatomy Ovaries Retroperitoneal Broad Ligament Suspensory Ligament Functions: Ovum production Hormone production Circulation: Ovarian Artery and Vein Histology Capsule: Tunica albuginea Germinal epithelium (misnomer) Ovarian cortex with developing gametes Medulla has blood supply Oogenesis (= ovum production) Takes place inside ovarian follicles in ovaries as part of ovarian cycle Oogonia (= stem cells) complete mitotic divisions before birth At birth: ~ 2x106 primary oocytes At puberty: ~ 400,000 primary oocytes 40 years later: 0 (even though only ~ 500 used) Atresia Ovulation Oogenesis Fig Ovarian cycles start at puberty under influence of estrogen. Oogenesis Primordial follicle A dormant stage, ready to develop Each month some proceed Most (99%) atrophy (atresia) .

• Y học thường thức
• ReproFemale
• The Reproductive System
• Overview of Anatom
• Ovaries
• HistologHistology