The stomach, located on the left side of the upper abdomen of the human body, has a very versatile: 1.food storage: when eating diastole, the food temporarily stay in the stomach for digestion; 2. Digestion and absorption: mechanical and chemical digestion of food through peristalsis of the stomach and secretion of gastric acid and pepsin; 3. Secretion function: gastric juice, gastrin, etc.;
4. Defense function: gastric mucosal barrier, gastric acid, secretory IgG, IgA, etc., can prevent the invasion of pathogenic microorganisms and foreign bodies.
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