The part of the gastrointestinal tract that continues from the sigmoid colon of the large intestine to the anal canal and has a thick muscular layer. It follows the curvature of the sacrum and is firmly attached to it by connective tissue. The rectum is about 12 cm long and ends about 5 cm below the tip of the coccyx, at the beginning of the anal canal. Feces is stored in the rectum before being expelled along the anal canal.
Related entries• colon and rectal cancer
• colon and rectal cancer treatment
Related category• ANATOMY AND PHYSIOLOGY
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