Colonoscopy vs. Sigmoidoscopy: What’s the Difference? If your doctor wants to check the health of your colon — whether as part of a routine screening or to investigate a concern — they may recommend a ...

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 ...