In the right lower abdomen, the large intestine (colon) begins with the cecum, to which the appendix is attached, continues upward on the right side (ascending colon), takes a curve (right flexure) and passes transversely (C. transversum) to the left side of the abdomen, takes another downward curve (left flexure), leads downwards (C. descendens) and issues in to an S-shaped loop (sigma) in the rectum (rectum). Although it is about 1 metre long, its length can vary considerably. No more nutrient absorption takes place in the colon; instead fluid is absorbed from the gradually thickening stool.

Colon polyps

Colon cancer