What is the primary function of the sperm duct?

The primary function of the sperm duct, also known as the vas deferens, is to conduct sperm from the testes to the urethra. After sperm are produced in the testes, they are transported through the sperm duct as part of the pathway leading to their eventual ejaculation during sexual intercourse. This duct facilitates the movement of mature sperm, ensuring they are delivered to the site of ejaculation in a timely and efficient manner.

While the sperm duct is involved in transporting sperm, it does not store sperm; that function is provided by the epididymis, which is located near the testes where sperm mature and are stored prior to ejaculation. Additionally, the sperm duct does connect with structures involved in the reproductive process, such as the seminal vesicle, but its main role is the transport of sperm. Transporting urine is a function of the urethra, not the sperm duct, highlighting the specific reproductive role of the sperm duct in human male anatomy.