Researchers say they have discovered an entirely new class of life inside the human body, and it is very similar to a virus.

The digestive system is the series of tubelike organs that convert our meals into body fuel. There are about 30 feet (9 meters) of these convoluted pipeworks, starting with the mouth and ending ...

In the animal kingdom, the vertebrate intestine is renowned for its regenerative capacity, a vital process for maintaining ...

PBS Nova spoke with physiology experts and competitors to find out what happens to the human body during intense ... interfere with digestion and other gastrointestinal functions.

Find out about the different stages of a human life cycle and how we change ... Discover how the food gets into the body, through the digestive system. What happens to food in your mouth?

This short film offers a look at respiration and a tour around the circulatory system and digestive system in the human body, through blood vessels and into mitochondria. There is a detailed ...

In a study being published today in Cell, the scientists present a method that can simultaneously identify, through testing a stool sample, all the proteins in the intestine – including those from ...