NLN NEX Anatomy Practice Test

Sperm production happens in the seminiferous tubules, the coiled tubes inside each testicular lobule where germ cells progress through spermatogenesis with support from Sertoli cells. These tubules line the interior with developing sperm cells—from spermatogonia to spermatozoa—that eventually mature and are released into the tubule lumen. The epididymis, outside the testes, stores and matures the sperm after they leave the tubules; the vas deferens transports them toward the urethra, which is the final passage for semen during ejaculation. So the site within the testes where sperm are produced is the seminiferous tubules.