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2018-07-22 03:03:41 by Pereira cheri
Stomach The stomach is entered by the cardiac orifice which relaxes to admit the food and then closes. The mucous membrane of the stomach is lined and columnar epithelium, in which are embedded little pits called the gastric glands. Gastric juice pours from these glands when they are stimulated by the approach of food. The muscular coat of the stomach produces movements which churn the food and tend to urge it towards the intestine, but the pylorus (opening from the stomach) opens only in response to an acid stimulus. The food received from the gullet is alkaline, owing to the presence of salivary secretions, and so it stays in the stomach until thorough mixing and the hydrochloric acid in the gastric juice has rendered it acid.
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