The mucus protects the lining of the ____________.

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Solution

Mucus:
The mucus protects the inner lining of the stomach from the secretion of the HCl.
Hydrochloric acid (HCl), which is a strong acid that kills bacteria present in the food material.
The mucus present in the gastric juice plays an important role in lubrication and protection of the mucosal epithelium.
Final answer: The mucus protects the lining of the stomach.

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