What is the role of saliva in the digestion of food?

Explanation

### Step-by-Step Solution:

1. **Definition of Saliva**: Saliva is a watery fluid present in the mouth, secreted by the salivary glands.

2. **Source of Saliva**: The salivary glands, which are located under the tongue, are responsible for producing saliva.

3. **Enzymatic Action**: Saliva contains an enzyme called salivary amylase.

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