Medical Encyclopedia: Digestive Disease (MedlinePlus)

Digestive diseases are disorders of the digestive tract, which is sometimes called the gastrointestinal (GI) tract.

In digestion, food and drink are broken down into small parts (called nutrients) that the body can absorb and use as energy and building blocks for cells.

The digestive tract is made up of the esophagus (food tube), stomach, large and small intestines, liver, pancreas, and the gallbladder.