The anus is the opening at the end of the digestive tract where stool leaves the body. The rectum is the section of the digestive tract above the anus where stool is held before it passes out of the body through the anus. The anus is formed partly from the surface layers of the body, including the skin, and partly from the intestine. The rectal lining consists of glistening red tissue containing mucus glands—much like the rest of the intestinal lining.

The anus is that part of the intestinal tract that passes through the muscular canal of the pelvis and anal sphincters. It is the final orifice through which stool passes out of the body. In adults, the anus is 4 to 5 centimeters long. The lower half of the anal canal has sensitive nerve endings. There are blood vessels under the lining, and in its mid portion there are numerous tiny, anal glands.

The anus is the opening of the rectum through which stool passes out of your body. Problems with the anus are common. They include hemorrhoids , abscesses , fissures cracks , and cancer. You may be embarrassed to talk about your anal troubles.

Many Americans have difficulty moving their bowels. Many things contribute to this problem, including diet and activity level. Other causes are unknown. The large bowel consists of the colon 5 feet long and the rectum 8 inches long.