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 ...

This age-old connection, based on the notion that celestial forces affect our physical being, provides intriguing ...

Teeth are made of enamel, calcium, and other substances. This article defines key terms to help you understand how teeth fit ...