Why Do People Get a Colonoscopy for Ulcerative Colitis? Ulcerative colitis is a type of inflammatory bowel disease that causes inflammation and sores to form in the large intestine and rectum. It ...

The large intestine—which includes the cecum, colon, rectum, and anus—is a key part of the digestive system. It's a long, thin organ at the end of your digestive tract where your body produces and ...