Deferens

Deferens is a part of the male reproductive system, specifically a tube that carries sperm from the epididymis to the ejaculatory ducts in anticipation of ejaculation. There are two of these ducts, known as the vas deferens or ductus deferens.

Anatomy

The deferens is a muscular tube that begins at the lower end of the epididymis and ends at the ejaculatory ducts. It is approximately 30 centimeters long in humans and is lined with pseudostratified columnar epithelium surrounded by smooth muscle.

Function

The primary function of the deferens is to transport mature sperm to the urethra in preparation for ejaculation. The smooth muscle in the wall of the duct contracts in a peristaltic wave, which propels the sperm forward.

Clinical significance

In a procedure known as a vasectomy, the deferens is cut or otherwise sealed off to prevent sperm from reaching the urethra, thus rendering a man sterile. This is a common form of male contraception.

See also

• Epididymis
• Ejaculatory duct
• Vasectomy
• Male reproductive system

References

Deferens Resources
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