| Abstract: | Collectively, the rectum and anal canal constitute the very terminal segment of the large intestine, and thus of the entire gastro-intestinal tract. Their distal location renders the rectum and anal canal readily accessible to direct inspection and examination. The prime function of the rectum is to act as a distensible reservoir for faeces, while the anal canal incorporates in its wall a powerful muscular sphincter which is of paramount importance in the mechanism of faecal continence. Diseases of the rectum and anal canal, both benign and malignant, account for a very large part of colorectal surgical practice worldwide. This article emphasizes the clinically and surgically relevant aspects of the anatomy of the rectum and anal canal. |
