Which structure transports sperm from the testis to the vas deferens through a convoluted, highly coiled duct?

Which structure transports sperm from the testis to the vas deferens through a convoluted, highly coiled duct?

• A. Efferent ducts
• B. Epididymis
• C. Vas deferens
• D. Seminal vesicle

Answer: (B)

The epididymis is the long, highly coiled duct that carries sperm from the testis toward the vas deferens. Its extensive coiling provides the surface area and space needed for sperm to mature, become motile, and be stored until ejaculation. As sperm move from the head to the tail of the epididymis, they undergo essential maturation changes and gain the ability to fertilize. Other structures have different roles or forms: the efferent ducts are a collection of small ducts that funnel sperm from the testis into the epididymis, not a single long, twisty duct; the vas deferens is a muscular tube that transports sperm after maturation but isn’t the highly coiled duct where maturation occurs; and the seminal vesicles are glands that secrete fluids for semen rather than serving as a conduit for sperm maturation.

The epididymis is the long, highly coiled duct that carries sperm from the testis toward the vas deferens. Its extensive coiling provides the surface area and space needed for sperm to mature, become motile, and be stored until ejaculation. As sperm move from the head to the tail of the epididymis, they undergo essential maturation changes and gain the ability to fertilize.

Other structures have different roles or forms: the efferent ducts are a collection of small ducts that funnel sperm from the testis into the epididymis, not a single long, twisty duct; the vas deferens is a muscular tube that transports sperm after maturation but isn’t the highly coiled duct where maturation occurs; and the seminal vesicles are glands that secrete fluids for semen rather than serving as a conduit for sperm maturation.