Subcutaneous tissue of penis

Subcutaneous Tissue of Penis

The Subcutaneous Tissue of Penis is a layer of tissue that lies beneath the skin of the penis. It is composed of various types of connective tissue and fat cells, which provide insulation and protection to the underlying structures.

Cross-section of the penis showing the subcutaneous tissue (labelled as Dartos fascia)

Structure

The subcutaneous tissue of the penis, also known as the superficial fascia, is divided into two layers: the outer Dartos fascia and the inner Buck's fascia. The Dartos fascia is a layer of smooth muscle tissue, while Buck's fascia is a deep layer of dense fibrous connective tissue.

Dartos Fascia

The Dartos fascia is a layer of smooth muscle tissue that lies directly beneath the skin of the penis. It is responsible for the wrinkling of the skin of the penis and scrotum in response to cold temperatures, a function known as the "cremasteric reflex".

File:Dartos fascia.png

Diagram showing the Dartos fascia in the penis

Buck's Fascia

Buck's fascia is a deep layer of dense fibrous connective tissue that surrounds the corpora cavernosa and the corpus spongiosum, the erectile tissues of the penis. It plays a crucial role in maintaining the rigidity of the penis during erection.

File:Bucks fascia.png

Diagram showing Buck's fascia in the penis

Function

The subcutaneous tissue of the penis serves several important functions. It provides insulation and protection to the underlying structures of the penis, including the urethra and the erectile tissues. It also plays a role in temperature regulation, with the Dartos fascia contracting in response to cold temperatures to reduce heat loss.

Clinical Significance

Damage or disease affecting the subcutaneous tissue of the penis can lead to a variety of medical conditions, including Peyronie's disease, a condition characterized by the formation of fibrous plaques in the tunica albuginea, and Fournier's gangrene, a life-threatening necrotizing infection that can affect the genital region.