A vitamin-sized capsule that beams light inside the gut could change how scientists study digestion and the gut-brain connection.

Animals that truly can’t fart lack a digestive system to break down food in a way that creates gas inside of a closed space (like an intestine) and then expels it.

Elk have unique and complex digestive systems that allow them to survive harsh winters by foraging for woody stems, which humans and other animals can't digest. Colorado Parks & Wildlife/Courtesy ...

Not definitions of the words, but what do these classifications mean in terms of the digestive systems of these animals?

How did dinosaurs digest the food they ate? Using modern animals as models, make your own digestive system to learn more.