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 ...

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 ... our important organs. How do your muscles work? Find out how our muscles help us move by contracting and relaxing. What is the digestive system?

Teeth are the hardest substance in the human body—even harder than bones ... Technically, teeth are part of the digestive system (not the skeletal system). They begin the digestive process ...

Scientists with the Human Cell Atlas (HCA), an international ... to shed pounds These studies map cells in organs like the lungs, brain, skin, and digestive tract. Researchers have even created ...