New research finds there is significant variation in the anatomy of the human digestive system, with pronounced differences possible between healthy individuals. The finding has implications for ...

The digestive system serves the role of taking in nutrients, eliminating waste, and absorbing and using the nutrients we take in. The digestive system includes all the parts of your body that are ...

Humans lack the digestive enzymes and specialized anatomy to break down cellulose, the main component of grass, unlike herbivores. Early human ancestors consumed plant material, but their digestive ...