What are intestinal villi? Write its significance.

Explanation

### Step-by-Step Solution:

1. **Definition of Intestinal Villi**:
- Intestinal villi are small, finger-like projections that line the inner surface of the small intestine. They increase the surface area available for absorption.

2. **Location**:
- These villi are specifically found in the small intestine, which is a long, coiled tube where most of the digestion and absorption of nutrients occurs.

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