What does the colon do?

The colon plays an important role in the digestive system. In this video, gastroenterologists Drs. Echavarria and Gelrud explain some of the colon’s important functions - such as the absorption of water from undigested food to produce stool (feces), the accumulation and delivery of stool to the rectum prior to a bowel movement, and the absorption of certain nutrients that are important for the maintenance of good health. Additionally, the experts discuss how a colonoscopy procedure is helpful in cases where the colon is diseased, inflamed, or infected, and to screen for colon cancer.

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Feels like my colon died. I'm very constipated.