Which structure produces sperm cells in human males?

• A. Ovaries
• B. Testes
• C. Epididymis
• D. Seminal vesicles

Answer: (B)

The structure that produces sperm cells in human males is the testes. Within the testes are tightly packed seminiferous tubules where germ cells undergo spermatogenesis, a process that builds mature sperm by successive rounds of division and maturation. The testes also contain Leydig cells that produce testosterone, which supports this process, but the actual production of sperm happens in the seminiferous tubules. The epididymis stores and helps sperm mature after they’re formed, while the seminal vesicles contribute fluid to semen. Ovaries are the female gonads and do not produce sperm.