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 ...

Stephanie J. Ellis is at the Howard Hughes Medical Institute, Robin Neustein Laboratory of Mammalian Cell Biology and Development, Rockefeller University, New York, New York 10065, USA, and at Max ...