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Stomach, large organ of the digestive system. It receives food from the esophagus and mixes it with hydrochloric acid and the stomach enzymes; fats are partially emulsified. After some time, the pyloric sphincter relaxes and food enters the duodenum and the rest of the gastrointestinal tract.

See also: Digestive system.

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21st Century Webster's Family Encyclopedia21st Century Webster's Family Encyclopedia - Sterility to Swedish