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Wikipedia:Picture of the day/July 27, 2005

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Picture of the day

Control of stomach acid

The movement and the flow of chemicals into the stomach are controlled by both the autonomic nervous system and by various digestive system hormones. Gastric acid is the main secretion of the stomach, characterised by H2O, hydrochloric acid and several enzymes (mainly pepsinogen). Gastic acid is produced by the parietal cell (wall cell) of the gastric mucosa.

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