Reproduction Essay

734 WordsAug 7, 20123 Pages
REPRODUCTION SYSTEM Reproduction: • Primary Sex Organs - Gonads (Male/Testes and Female/Ovaries) • Gonads - produce sex cells or gametes – secrete steroid hormones • Accessory Reproduction Organ - ducts, glands and external genitalia • Goal of reproduction – common goal for male and female is to produce offspring. The Male: • The Scrotum - pouch or skin sac containing testes (gonads). Located at base of penis outside abdominal cavity. • The Testes – Approx. 1.5” long. Covered by tunica vaginali & tunica albuginia. Other: seminiferous tubules, myoid cells, straight tubule, rete testis, interstitial cells, testicular arteries, testicular veins, pampiniform venous plexus, spermatic cord • The Penis – External Male genitalia. Other: perineum, glans, prepuce, corpus spongiosum, bulb of penis, corpora cavernosa crura of the penis • The Male Duct System - Epididymis, Ductus Deferens, ampulla, ejaculatory duct, urethra • Male Birth Control - Vascectomy is the tying of the Ductus Deferens via simple surgical procedure to prevent sperm from leaving bodyir • Accessory Glands – Seminal vesicles or seminal glands, The Prostate, The Bulbourethral glands. Together produce semen and secretions. • Semen – Milky white substance containing sperm, testicular fluid and accessory gland secretions • Male Sexual Response – Erection (hardening of penis) and Ejaculation (release of sperm) • Spermatogensis – Events leading to sperm production (male gametes), including mitosis and meiosis • Meiosis – Gamete formation in both sexes involves meiosis, a unique nuclear division that takes place primarily in the gonads. Meiosis I and Meiosis II stages. Phases are named within each stage the same as in Mitosis (prophase, metaphase, anaphase, telephase) but Meiosis I has events unique and not found in Mitosis or Meiosis II. • Mitosis – Phases: prophase, metaphase, anaphase,

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