sperm are made in the seminiferous tubules of the human body.
sperm are made in the seminiferous tubules of the human body.
where in the seminiferous tubules are sperm made in the human body?
seminiferous tubules
spermatogenesis takes place within several structures of the male reproductive system. the initial stages occur within the testes and progress to the epididymis where the developing gametes mature and are stored until ejaculation. the seminiferous tubules of the testes are the starting point for the process, where spermatogonial stem cells adjacent to the inner tubule wall divide in a centripetal direction—beginning at the walls and proceeding into the innermost part, or "lumen"—to produce immature sperm. maturation occurs in the epididymis. the location [testes/scrotum] is specifically important as the process of spermatogenesis requires a lower temperature to produce viable sperm, specifically 1°-8 °c lower than normal body temperature of 37 °c (98.6 °f). clinically, small fluctuations in temperature such as from an athletic support strap, causes no impairment in sperm viability or count.
spermatogenesis
sperm count declines with age, with men aged 50–80 years producing sperm at an average rate of 75% compared with men aged 20–50 years. however, an even larger difference is seen in how many of the seminiferous tubules in the testes contain mature sperm;









































bullet::::- in males 20–39 years old, 90% of the seminiferous tubules contain mature sperm









































bullet::::- in males 40–69 years old, 50% of the seminiferous tubules contain mature sperm









































bullet::::- in males 80 years old and older, 10% of the seminiferous tubules contain mature sperm
virility