Where does sperm formation occur in the testis?

Sperm formation, or spermatogenesis, occurs in the seminiferous tubules of the testis. These tubules are highly coiled structures located within the testes, and their primary function is to produce spermatozoa. The process begins with spermatogonia, the precursor cells, which undergo several stages of division and maturation to ultimately develop into mature sperm cells.

The seminiferous tubules provide the ideal environment for this intricate process, as they contain not only the germ cells that develop into sperm but also Sertoli cells. These supportive cells nourish the developing sperm cells and help regulate the maturation process.

The other locations mentioned are not involved in the actual formation of sperm. The epididymis is responsible for the storage and maturation of sperm after they are formed, the vas deferens transports sperm from the epididymis during ejaculation, and the prostate gland contributes to the seminal fluid but does not produce sperm itself. Hence, the seminiferous tubules are crucial for the initial stage of sperm creation within the reproductive system.