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 ...

PBS Nova spoke with physiology experts and competitors to find out what happens to the human ... other gastrointestinal functions. Undigested matter can stay in the gastrointestinal tract for ...

The human gastrointestinal system principally refers to the stomach and intestine, but can encompass the entire gastrointestinal tract, including all structures and organs from the mouth to the anus.

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 ...