What is the role of mucus in stomach?

Explanation

**Step-by-Step Solution:**

1. **Understanding the Stomach's Function**: The stomach is a crucial part of the digestive system where food is digested after it passes through the esophagus, which is the food pipe.

2. **Role of Hydrochloric Acid (HCl)**: The stomach secretes hydrochloric acid (HCl), which creates an acidic environment (around pH 1.8). This acidity is essential for:
- Killing harmful pathogens such as bacteria and viruses that may be present in the food.
- Aiding in the digestion of food.

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