Proctologist is a medical specialty that deals with diseases, diagnosis and treatment of the colon. The colon is comprised of three main sections within the abdominal cavity: the transcending colon, ascending colon, and descending colon.
As food is digested and converted into waste, it passes through the small intestine first. There nutrients are extracted and passed along to the colon before they leave through the rectum. The colon also extracts nutrients from the food into the bloodstream. This happens via the walls of the large intestine. Simultaneously stool is excreted down to the rectum
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