What are the units of absorption in the small intestine of man?

Explanation

**Step-by-Step Solution:**

1. **Understanding the Structure of the Small Intestine**: The small intestine is lined with numerous finger-like projections known as villi. These structures play a crucial role in the absorption process.

2. **Function of Villi**: Villi increase the surface area of the small intestine significantly. This increased surface area is essential for maximizing the absorption of nutrients from digested food.

3. **Blood Supply**: Each villus has a rich supply of blood vessels. This is important because it allows for the efficient transport of absorbed nutrients into the bloodstream.

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