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 ...

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

Probiotics support healthy body systems from your mouth to your ... gut go beyond just healthy bowel movements. A healthy digestive system has been linked to improvements in mental health and ...

Your heart's will to beat, to keep going, is incredibly strong. If the heart fails, so does everything else… Because it's your heart's job to deliver to every cell, to every nook and cranny of ...

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

PBS Nova spoke with physiology experts and competitors to find out what happens to the human body during intense speed eating competitions. It turns out these “athletes” train their stomachs ...