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 ...

The human body has several distinct microbiomes—on the skin, in the mouth and in our airways—but the most consequential one for health is in the digestive system, commonly called the gut microbiome.

When it comes to good health, diet and exercise are not the only players. The timing of your meals is just as crucial, and ...

Digestion is an important process in the human body. It helps us get the nutrients our body needs to stay healthy. Digestion happens in the digestive system, which begins at the mouth and ends at ...

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 ...

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

Focus will include the six major nutrients: carbohydrates, lipids (fats), protein, vitamins, minerals, and water and their importance in the human body. Digestion, absorption, and metabolism in the ...

Our gut is a bustling hub of activity, home to trillions of microbes that work together with our bodies to keep us healthy. A recent study explores one fascinating aspect of this partnership: how gut ...