What in the Stomach Produces Hydrochloric Acid?
Function of Stomach Acid
How Acidic is Stomach Acid?
Why Doesn’t the Stomach Digest Itself?
THE STOMACH does not digest itself because it is lined with epithial cells, which produce mucus. This forms a barrier between the lining of the stomach and the contents. Enzymes, which make up part of the digestive juices are also secreted by the stomach wall, from glands with no mucus barrier.
The stomach does not digest itself for two reasons. First, the enzyme pepsin is produced in the inactive form, pepsinogen, to prevent damage to the stomach wall. Second, the stomach also secretes mucus, which lines the inside of the stomach to protect it from gastric juice.
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