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Reproduction in Men
The male reproductive system is both internal and external.
The testes lie in the scrotum, the pouch of skin located beneath the man's penis. The testes are the organs that produce sperm and testosterone.
From the testes, sperm pass slowly through the coiled channels of the epididymis, where they mature.
Once sperm are mature, they move into the vas deferens, a tube that connects the epididymis with the urethra via a common ejaculatory duct. The entire process of sperm formation takes approximately 72 days.