The epididymis is primarily involved in which function?

• A. Stores sperm
• B. Produces sperm
• C. Filters blood
• D. Drains urine from the bladder

Answer: (C)

The main idea here is understanding what the epididymis actually does in the male reproductive system. After sperm are produced in the testes, they enter the epididymal duct, where they spend time maturing and gaining the ability to swim and fertilize an egg. The epididymis acts as a storage reservoir as well, holding mature sperm until ejaculation. It’s not where sperm are produced—that happens in the testes. It’s also not involved in filtering blood—that’s the job of the kidneys—and it doesn’t drain urine from the bladder—that’s the urinary tract’s role. So the primary function of the epididymis is storing (and enabling maturation of) sperm.