Final answer:
The vas deferens is the tube that carries sperm from the epididymis to the urethra, with the epididymis being where sperm mature and are stored. The prostate gland, misstated as being in the testes, is actually located beneath the bladder.
Step-by-step explanation:
The tube that sperm travels through to reach the urethra is the vas deferens. This part of the male reproductive system functions as a passageway, carrying sperm from the epididymis, into the pelvic cavity, and eventually to the ejaculatory ducts, which lead to the urethra. Notably, the epididymis is the location where sperm mature after being produced in the seminiferous tubules within the testes, and where they are stored until ejaculation. Contrary to one of the statements provided as options, the prostate gland is not located in the testes but is situated beneath the bladder, and this gland, along with the bulbourethral glands, contributes fluid to the semen.