The main function of the stomach is to support the digestive system by mechanical and chemically breaking down food.  The stomach receives the food after the mouth breaks the food down mechanically  by muscle action.  The stomach receives food after the mouth breaks down the food acids and enzymes for the chemical breakdown of food.  Enzyme pepsin is responsible for protein breakdown.  The stomach releases food into the small intestine in a controlled and regulated manner.

The cardia is the first portion of the stomach and is where food content passes from the esophagus in to the stomach.  The fundus stores undigested food and also the gases released from the chemical digestion of food.  The corpus is the largest of the four parts that make up the stomach.   The pylorus is connected to the duodenum or the beginning of the small intestine.

The parietal cells secrete hydrochloric acid and releases pepsin for protein digestion.  The mucous cells protect the stomach linings from stomach acid.  The chief cells secrete pepsin.  The G cells stimulate the secretion of hydrochloric acid.

Some diseases that the stomach is susceptible to are: Diarrhea, Gastritis, and stomach cancer.

-Ashley Shylanski  -D Period  -4/29/13


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