Absorption of substances takes place in different parts of the alimentary canal. However maximum absorption takes places in

Options

A. Small intestine
B. Large intestine
C. Transverse colon
D. Ascending colon

Answer

**Step-by-Step Solution:**

1. **Understanding the Alimentary Canal**: The alimentary canal is a continuous tube that extends from the mouth to the anus, comprising various parts including the mouth, esophagus, stomach, small intestine, large intestine, and anus.

2. **Identifying Absorption Sites**: Absorption of nutrients occurs at different stages in the alimentary canal. While some absorption happens in the stomach and large intestine, the primary site for absorption is the small intestine.

3. **Function of the Small Intestine**: The small intestine is specialized for absorption due to its structure. It has a large surface area created by folds, villi, and microvilli, which increases the area available for absorption.

4. **pH and Nutrient Absorption**: The small intestine operates at a neutral pH, which is optimal for the enzymes that digest food and facilitate absorption. This neutral environment enhances the efficiency of nutrient uptake.

5. **Conclusion**: Given these factors, we conclude that the maximum absorption of substances occurs in the small intestine.

**Final Answer**: Maximum absorption takes place in the **small intestine**.

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