Vas Deferens

The vas deferens, also known as the ductus deferens, is a long, muscular tube in the male reproductive system. It plays a crucial role in transporting sperm from the epididymis to the urethra during ejaculation. Each testicle has its own vas deferens, and these tubes are about 30 centimeters (12 inches) long in adult males.

Additional Information

The vas deferens is an essential part of male fertility. During sexual arousal and ejaculation, the smooth muscles in the vas deferens contract, propelling sperm along its length. The sperm then mixes with fluids from the seminal vesicles, prostate, and other glands to form semen.

Vasectomy, a common form of male sterilization, involves cutting or blocking the vas deferens to prevent sperm from reaching the urethra. This procedure is generally considered permanent but can sometimes be reversed.