The stomach is a muscular organ located on the left side of the upper abdomen. The stomach receives food from the esophagus. As food reaches the end of the esophagus, it enters the stomach through a muscular valve called the lower esophageal sphincter.
The stomach secretes acid and enzymes that digest food. Ridges of muscle tissue called rugae line the stomach. The stomach muscles contract periodically, churning food to enhance digestion.
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Stomach is also known as a carry bag of food, where it store the food and digest it accordingly when necessary.
there are some types of stomach i.e, pyloric stomach and cardiac stomach which stores food.
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stomach secretes gastric juice which helps in digestion.gastric glands release gastric juice . hydrochloric acid and mucus.gastric juice contains 2 enzymes , pepsin and rennin.
pepsin changes proteins into peptones,hydrochloric acid helps this conversion and also kills many harmful bacteria.rennin changes milk proteins into insoluble curd.mucus protects the inner lining of the stomach from the action of the acid under normal conditions.