Vas deferens

Definition

The vas deferens is a muscular tube that transports sperm from the epididymis to the ejaculatory ducts in preparation for ejaculation. It plays a crucial role in male reproductive physiology.

5 Must Know Facts For Your Next Test

1. The vas deferens is approximately 30-45 cm long and is part of the spermatic cord.
2. Its inner lining is composed of pseudostratified columnar epithelium with stereocilia, which aid in the transport of sperm.
3. During vasectomy, the vas deferens is cut or sealed to prevent the transport of sperm, leading to sterilization.
4. It connects with seminal vesicles to form the ejaculatory duct, which then passes through the prostate gland.
5. Infections can ascend through the vas deferens from the urogenital tract, potentially causing conditions like epididymitis.

Review Questions

• What is the primary function of the vas deferens?
• How does a vasectomy affect the vas deferens?
• What type of epithelial cells line the inner surface of the vas deferens?

Related terms

Epididymis: A coiled tube where sperm mature and are stored before being transported via the vas deferens.

Seminal Vesicles: Glands that secrete fluid that partly composes semen and connects with the vas deferens to form ejaculatory ducts.

Prostate Gland:

A gland surrounding the neck of the bladder in males that secretes a fluid component of semen.