végbél

Végbél, also known as the rectum, is the final section of the large intestine, terminating at the anus. It serves as a temporary storage site for feces before they are eliminated from the body through defecation. The average length of the rectum is approximately 15 centimeters in adults. Its walls are composed of several layers, including mucosa, submucosa, muscularis, and serosa, which allow for distension to accommodate fecal matter.

The rectum plays a crucial role in the defecation reflex. As the rectum fills with feces, stretch receptors in its walls are activated, sending signals to the brain. This triggers the urge to defecate. During defecation, the internal and external anal sphincters relax, allowing for the expulsion of feces.

Conditions affecting the rectum include hemorrhoids, which are swollen veins in the anus and rectum, and rectal prolapse, where the rectal tissue protrudes from the anus. Rectal cancer is another significant condition that affects this part of the digestive system. Diagnosis of rectal conditions often involves physical examination, colonoscopy, and biopsy. Treatment varies depending on the specific condition and may include dietary changes, medication, surgery, or radiation therapy.