Food is moved through the digestive system by muscular contractions called peristalsis, the small intestine, where waves of smooth muscle transport balls of ingested food to the gastrointestinal tract of stomach.
Peristalsis is the physiological mechanism through which food passes through your gastrointestinal tract. Your gastrointestinal tract's big, hollow organs are covered in a layer of muscle that allows the walls to move. The small intestine motion mixes the contents of each organ as it pushes food and fluids through your gastrointestinal tract. The esophagus, stomach, and intestines move when food travels through the small intestine , yet a person is often unaware of these motions.
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