The absorption of nutrients and exchange of respiratory gases between blood and tissues takes place in –

Options

A. veins
B. arteries
C. heart
D. capillaries

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks where the absorption of nutrients and the exchange of respiratory gases between blood and tissues occur in the body.

2. **Analyzing the Options**:
- **Veins**: The primary function of veins is to carry deoxygenated blood back to the heart. They do not play a significant role in nutrient absorption or gas exchange.
- **Arteries**: Arteries carry oxygen-rich blood away from the heart to the body. While they transport oxygen, they do not facilitate nutrient absorption or gas exchange.
- **Heart**: The heart is responsible for pumping blood throughout the body. It does not participate in the exchange of nutrients or gases.
- **Capillaries**: Capillaries are tiny blood vessels that connect arteries and veins. They are the sites where the exchange of oxygen, carbon dioxide, and nutrients occurs between blood and tissues.

3. **Identifying the Correct Answer**: Based on the analysis, capillaries are the correct answer as they facilitate the absorption of nutrients and the exchange of respiratory gases.

4. **Final Answer**: The absorption of nutrients and exchange of respiratory gases between blood and tissues takes place in **capillaries**.

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