<prompt> True about spermatogenesis:It takes 74 daysTakes place in spermatic cordMeiosis occurs only after secondary spermatocyteSpermatid is formed from spermatozoa  <response>: 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. 