What are tears, and what are their functions?

Explanation

### Step-by-Step Solution:

1. **Definition of Tears**:
- Tears are a clear liquid secreted by the lacrimal glands, which are also known as tear glands located in the eyes.

2. **Types of Tears**:
- There are different types of tears, primarily categorized into:
- **Basal Tears**: These are the tears that continuously lubricate the eyes.
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