The exchange of gases is possible in lungs because of its

Options

A. large surface area
B. large internal volume
C. suitable temperature
D. suitable humidity

Answer

**Step-by-Step Solution:**

1. **Understanding Gas Exchange**: The process of gas exchange in the lungs involves the intake of oxygen and the release of carbon dioxide. This occurs during inhalation and exhalation.

2. **Role of Lungs**: The lungs are the primary organs responsible for this gas exchange. They facilitate the movement of air in and out of the body.

3. **Structure of Lungs**: The lungs contain tiny air sacs called alveoli. These alveoli are crucial for gas exchange.

4. **Alveoli and Capillaries**: The alveoli are surrounded by tiny blood vessels known as capillaries. The close proximity of alveoli and capillaries allows for efficient gas exchange.

5. **Importance of Surface Area**: The large surface area of the alveoli is essential. It allows for a greater volume of air to be exchanged, which is necessary for sufficient oxygen intake and carbon dioxide removal.

6. **Air Volume**: The lungs can handle a significant amount of air, approximately 5 to 8 liters per minute. This capacity is made possible by the large surface area of the alveoli.

7. **Conclusion**: Therefore, the exchange of gases in the lungs is primarily possible due to the large surface area provided by the alveoli.

**Final Answer**: The exchange of gases is possible in the lungs because of its large surface area.

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