"My stomach hurts." It's one of the most common complaints from school-aged children and young teens. Occasional stomach pain ...

The brown color of poop comes from the bile that is added by the liver to your bowl of cereal as it makes its way through the small intestine. The bile is changed by bacteria from green to brown.

This film explores the complex process of human digestion, detailing how food is broken down into molecules by the digestive system. It follows the journey of food from the mouth, where it is ...

Bacteria in the digestive system may work to maintain balance both directly and indirectly by Osaka Metropolitan University edited by Sadie Harley, reviewed by Robert Egan Editors' notes ...