Explain the process of digestion in small intestine.

Explanation

### Step-by-Step Solution:

1. **Introduction to the Small Intestine**: The small intestine is a crucial part of the digestive system where most of the digestion and absorption of nutrients occurs after food leaves the stomach.

2. **Mixing of Food**: The process of digestion in the small intestine begins with the muscular walls of the small intestine contracting and relaxing. This movement helps mix the food with digestive juices.

3. **Digestive Juices**: The digestive juices that aid in this process are secreted from three main sources:
- **Pancreas**: Produces enzymes that help break down carbohydrates, proteins, and fats.
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