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The Stomach

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The Stomach
ARMY PUBLIC SCHOOL, KIRKEE

Project Report
On
Human Digestive organ- Stomach

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* THE STOMACH…………………………………………….…………….……………………………………..3 * FUNCTIONS OF STOMACH……………………………………………………………...…………………3 * THE DIVISIONS OF STOMACH………………………………………………………..………………….4 * THE LAYERS OF THE STOMACH…………………..………………………………….………………..5 * PROCESS OF DIGESTION…………………………………..………………………………………………7 * Mechanical digestion……………………………………………………………………………..7 * Chemical digestion…………………………………………………………………………………8 * PHASES OF DIGESTION…………………………………………………………..………………………11 * Cephalic phase…………………………………………………………….………………………11 * Gastric phase……………………………………………………………………………………….12 * Intestinal phase……………………………………………………………………………………13 * DUODENUM…………………………………………………………………………...………………………14 * GASTRIC EMPTYING…………………………………………………………….…………………………15 * SOME STOMACH CONDITIONS AND DISEASES………………………………………………..16

THE STOMACH

The stomach is a muscular sac that lies between the esophagus and the small intestine in the upper abdomen. The stomach is not the only part of your digestive system that absorbs food but rather is a part of the digestive system and important for churning food into a consistency that is easier to digest for the rest of your intestines.

FUNCTIONS OF STOMACH * The stomach is J-shaped and it can expand to temporarily store food. * Partial digestion of the food takes place here. The churning action of the stomach muscles physically breaks down the food. * The stomach releases acids and enzymes for the chemical breakdown of food. The enzyme pepsin is responsible for protein breakdown. * The stomach releases food into the small intestine in a controlled and regulated manner.
Chewed food passes from the esophagus into the stomach; the flow is somewhat regulated by the esophageal sphincter but more importantly depends on how fast you eat and if you are eating
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