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The right testis, exposed by laying open the tunica vaginalis

The testes are bilateral bean-like structures which are the site of sperm production, located in the scrotum. They are formed when the testes descend through the inguinal canals into the perineum. Each testis is covered by a fibrous capsule, called the tunica albuginea, and each contains the seminiferous tubules, the site of spermatozoa development. The seminiferous tubules connect to ducts (rete testis) which leave the testis to join the epididymis.