Which structure functions to transport sperm to the urethra during ejaculation?

The vas deferens is the structure responsible for transporting sperm from the epididymis to the urethra during ejaculation. It serves as a muscular tube that propels sperm through peristaltic contractions, allowing for the movement during the ejaculation process. The vas deferens connects to the ejaculatory duct, eventually leading to the urethra, where sperm is expelled from the body.

The seminal vesicle produces a significant portion of the seminal fluid that nourishes sperm, but it does not transport sperm itself. The prostate gland contributes additional fluids to the semen but is involved in a different function than the actual transportation of sperm. The urethra is the final pathway through which semen is expelled, but it does not transport sperm during the phases prior to ejaculation. This clarifies why the vas deferens is the correct choice for the mechanism of sperm transport during ejaculation.