Tunica albuginea of testis

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Tunica albuginea of testis

The tunica albuginea is a dense layer of white fibrous connective tissue that surrounds the testis. It is an essential structure in the male reproductive system, providing support and protection to the testicular tissue.

Structure

The tunica albuginea is composed of collagen fibers and is relatively thick and tough. It forms the outermost layer of the testis, lying just beneath the tunica vaginalis, which is a serous membrane. The tunica albuginea extends into the testis, forming septa that divide the testis into approximately 250 lobules. Each lobule contains one to four seminiferous tubules, where spermatogenesis occurs.

Function

The primary function of the tunica albuginea is to protect the delicate seminiferous tubules and maintain the structural integrity of the testis. It also plays a role in the regulation of intratesticular pressure, which is crucial for the proper functioning of the seminiferous tubules and the process of spermatogenesis.

Clinical Significance

Damage or abnormalities in the tunica albuginea can lead to various medical conditions. For example, a tear in the tunica albuginea can result in a testicular rupture, which is a medical emergency. Additionally, conditions such as Peyronie's disease involve the formation of fibrous plaques within the tunica albuginea of the penis, which can cause pain and curvature during erections.

Related Structures

• Tunica vaginalis
• Seminiferous tubules
• Testis
• Spermatogenesis
• Peyronie's disease

See Also

• Male reproductive system
• Testicular anatomy
• Connective tissue