The picture given below is a part of alimentary canal. Answer the questions that follows:
What is the significance of hydrochloric acid in the digestive juice?

Explanation

### Step-by-Step Solution:

1. **Identify the Role of Hydrochloric Acid**: Hydrochloric acid (HCl) is a key component of gastric juice, which is secreted by the stomach lining.

2. **Protein Digestion**: One of the primary functions of hydrochloric acid in the stomach is to create an acidic environment. This acidity is crucial for activating digestive enzymes, such as pepsin, which break down proteins into smaller peptides.

3. **Bacterial Defense**: Hydrochloric acid also plays an important role in protecting the body from pathogens. The acidic environment helps to kill harmful bacteria and microorganisms that may be present in the food we consume.

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