Vasa efferentia

Vasa Efferentia are a series of small ducts found in the male reproductive system, specifically within the testes. These ducts play a crucial role in the transport of sperm from the seminiferous tubules to the epididymis, where the sperm mature and are stored until ejaculation.

Anatomy

The vasa efferentia originate from the rete testis, a network of tubules located in the mediastinum testis. From there, they extend to the caput epididymis, the head of the epididymis. The number of vasa efferentia can vary, but typically there are between 12 to 20 of these ducts in humans.

Function

The primary function of the vasa efferentia is to transport immature sperm from the seminiferous tubules, where they are produced, to the epididymis. This transport is facilitated by the cilia lining the ducts, which create a current that moves the sperm along. Once in the epididymis, the sperm undergo further maturation and are stored until they are expelled during ejaculation.

Clinical Significance

Abnormalities or damage to the vasa efferentia can lead to male infertility. For example, blockages can prevent sperm from reaching the epididymis, thus reducing the number of mature sperm available for ejaculation. Conditions such as varicocele, a swelling of the veins that drain the testicle, can also affect the function of the vasa efferentia and contribute to infertility.

See Also

• Male reproductive system
• Seminiferous tubules
• Epididymis
• Varicocele