Transverse folds of rectum

Illustration of the Transverse Folds of Rectum

The Transverse Folds of Rectum, also known as Houston's valves, are semi-lunar folds found within the rectum. These folds are named after the Scottish surgeon, John Houston, who first described them in 1830. They play a significant role in the human digestive system, particularly in the process of defecation.

Anatomy

The transverse folds of the rectum are typically three in number, but this can vary between individuals. They are located in the upper part of the rectum and are formed by an inward folding of the rectal wall. The folds are more prominent in the human rectum when compared to other mammals.

Function

The primary function of the transverse folds of the rectum is to maintain the fecal continence. They act as a barrier to prevent the involuntary passage of feces, thus playing a crucial role in the control of defecation.

Clinical Significance

Abnormalities or damage to the transverse folds of the rectum can lead to various medical conditions, including rectal prolapse and fecal incontinence. In some cases, these folds may also be involved in the development of rectal cancer.

See Also

• Rectum
• Human digestive system
• John Houston