Long, tightly coiled ducts that carry sperm from the testis to the vas deferens are called which structure?

• A. Epididymis
• B. Vas Deferens
• C. Seminal Vesicles
• D. Efferent Ducts

Answer: (A)

The epididymis is the long, tightly coiled duct that carries sperm from the testis to the vas deferens. It sits along the posterior aspect of the testis, and the ductus epididymidis provides a winding path from the head to the tail. As sperm travel through this duct, they mature, gain motility, and are stored until ejaculation. The other structures have different roles: the vas deferens is a muscular tube that transports mature sperm onward, not the tightly coiled duct itself; the efferent ducts are small channels that ferry sperm from the rete testis into the epididymis; the seminal vesicles are glands that add seminal fluid to semen.