Which structure transports mature sperm from the epididymis toward the ejaculatory ducts?

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Transport of mature sperm away from the epididymis toward the ejaculatory ducts is performed by the vas deferens. This muscular tube carries sperm from the tail of the epididymis through the spermatic cord and into the pelvic cavity, where peristaltic contractions propel the sperm toward the ejaculatory ducts. It ultimately joins with the duct of the seminal vesicle to form the ejaculatory duct, which then enters the prostatic urethra.

The other structures don’t fulfill this transport role in the same way: the urethra is the final passage for semen to exit the body, not the conduit from the epididymis toward the ejaculatory ducts; the epididymal duct transports sperm within the epididymis as they mature and then transitions into the vas deferens; the ejaculatory duct carries semen from the junction of the vas deferens and seminal vesicle into the prostatic urethra, not from the epididymis toward the ducts.