In which part of the small intestine does the absorption of nutrients takes place?

Options

A. Duodenum
B. Jejunum
C. Ileum
D. Both (a) and (b)

Explanation

**Step-by-Step Solution:**

1. **Understanding the Small Intestine:** The small intestine is divided into three main parts: the duodenum, jejunum, and ileum. Each part has specific functions in digestion and absorption.

2. **Identifying the Main Function of Each Part:**
- **Duodenum:** This is the first part of the small intestine where the majority of chemical digestion occurs. It receives bile from the liver and pancreatic juices, which help in breaking down food.
- **Jejunum:** This is the middle section of the small intestine and is primarily responsible for the absorption of nutrients. It has a large surface area due to the presence of villi and microvilli, which facilitate nutrient absorption.
- **Ileum:** This is the last part of the small intestine, which also absorbs nutrients, but to a lesser extent compared to the jejunum.

3. **Conclusion on Nutrient Absorption:** The majority of nutrient absorption occurs in the jejunum, although some nutrients like iron and folate can also be absorbed in the duodenum.

4. **Final Answer:** The part of the small intestine where the absorption of nutrients primarily takes place is the **jejunum**.

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