Why are Villi present in intestine and not in stomach?

Answer

### Step-by-Step Solution:

1. **Understanding Villi**: Villi are small, finger-like projections that line the inner surface of the small intestine. Their primary function is to increase the surface area available for absorption.

2. **Function of the Intestine**: The small intestine is the main site for nutrient absorption after the food has been digested. The increased surface area provided by the villi allows for more efficient absorption of nutrients into the bloodstream.

3. **Role of the Stomach**: The stomach's primary function is to digest food, not absorb it. It uses gastric juices to break down food into a semi-liquid form called chyme, but it does not have the structures necessary for absorption like villi.

4. **Absorption vs. Digestion**: After digestion in the stomach, the chyme moves into the small intestine, where the villi facilitate the absorption of nutrients. The stomach is not designed for this purpose, hence it lacks villi.

5. **Conclusion**: Villi are present in the intestine to maximize nutrient absorption, while the stomach is primarily focused on the digestion of food, which is why it does not have villi.