The primary functions of the testes include:
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Manufactures sperm within tiny, coiled tubes: The testes contain structures called seminiferous tubules where sperm production (spermatogenesis) occurs.
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Stores sperm until it matures: Sperm produced in the testes is initially stored in the epididymis, where it matures.
While the other functions listed can be associated with the male reproductive system (such as transporting mature sperm to the urethra and creating the fluid in semen), they are not direct functions of the testes themselves. Instead, the testes’ main roles are in sperm production and storage until maturation.