Villi are most numerous in ileum of small intestine. Why?

Explanation

### Step-by-Step Solution:

1. **Understanding Villi**: Villi are small, finger-like projections that extend from the mucosal layer of the small intestine. They play a crucial role in the digestive system.

2. **Location of Villi**: Villi are found throughout the small intestine, but they are most numerous in the ileum, which is the final part of the small intestine.

3. **Function of Villi**: The primary function of villi is to increase the surface area of the intestinal lining. This increased surface area is essential for the efficient digestion and absorption of nutrients from the food we consume.

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