True about spermatogenesis:: (A) It takes 74 days, (B) Takes place in spermatic cord, (C) Meiosis occurs only after secondary spermatocyte, (D) Spermatid is formed from spermatozoa
Answer is A. Ans. (a) It takes 74 daysRef. Textbook of Human Embroyology / 24* Spermatogenesis - Process of formation of spermatozoa from primitive germ cell (spermatogonia)* Spermiogenesis - Formation of spermatozoa from spermatid.* Spermatogenesis begins at-puberty (oogenesis begins intrauterine life)* Spermatogenesis continue-throughout life (oogenesis- stops at menopause)* Average time-74 days* Site- seminiferous tubule* Sperm size- 55-65 pm* Parts- head, neck, middle piece, principal piece, end piece.* Acquire motility in- epididymis.