HUMAN PHYSIOLOGY
DIGESTION AND ABSORPTION
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Detailed explanation-1: -Mucus is secreted by the stomach epithelial cells, but the mucus is mainly secreted from foveolar cells, found in the necks of the gastric pits. Mucus-secreting cells are the most abundant cell type in the stomach, giving indications of how important mucus is to the functioning stomach.
Detailed explanation-2: -Gastric mucus is a glycoprotein that serves two purposes: the lubrication of food masses in order to facilitate movement within the stomach and the formation of a protective layer over the lining epithelium of the stomach cavity.
Detailed explanation-3: -Mucus forms a protective lining on the inner wall of the stomach. It means it protects the wall of the stomach from the corrosive effect of hydrochloric acid and proteolytic nature of pepsin.
Detailed explanation-4: -Hydrochloric acid in the stomach is used to make the medium acidic to facilitate the action of the enzyme pepsin and to kill germs if any. Enzyme pepsin digests proteins and converts them into peptones. The mucus helps to protect the stomach wall from its own secretions of hydrochloric acid.