The rectum (intestinum rectum) is continuous above with the sigmoid colon, while below it ends in the anal canal.From its origin at the level of the third sacral vertebra it passes downward, lying in the sacrococcygeal curve, and extends for about 2.5 cm. in front of, and a little below, the tip of the coccyx, as far as the apex of the prostate. It then bends sharply backward into the anal.. Your rectum holds the waste and absorbs the remaining water until it's time to release it. What is the difference between the rectum and the anus? Your anal canal continues from your rectum and makes up the last few centimeters of your large intestine. The anus contains important muscles (anal sphincters) that control your bowel movements.
Explore the anatomy, function, and role of the rectum with Innerbody's interactive 3D model.. The rectum's unique anatomical location and functional capacity require precise knowledge for both medical assessment and surgical planning, particularly in colorectal oncology, proctology, and pelvic floor dysfunction.