Digestive System

Upper Gastrointestinal Tract

How does food leave the stomach and move to the intestine?

The pyloric sphincter, located between the stomach and duodenum, or small intestine, is never completely closed. Water and other fluids pass continually from the stomach to the duodenum. A small amount of chyme moves through the pyloric sphincter into the duodenum with each peristaltic contraction. The remainder of the chyme is forced back into the pyloric region of the stomach for further mixing.


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