Alveoli increase the surface area of the human lung which is approximately the size of a :

Options

A. tennis court
B. dining table
C. dinner plate
D. small bowl

Explanation

### Step-by-Step Solution:

1. **Understanding the Function of Alveoli**:
- Alveoli are tiny air sacs in the lungs where gas exchange occurs. They are crucial for taking in oxygen and expelling carbon dioxide from the body.

2. **Surface Area Importance**:
- The efficiency of gas exchange is directly related to the surface area available for diffusion. More surface area allows for more oxygen to be absorbed and more carbon dioxide to be released.

3. **Structure of Alveoli**:
- Alveoli have thin walls and are irregularly shaped, which increases their surface area. This structure is designed to maximize the area available for gas exchange.

4. **Collective Surface Area of Alveoli**:
- The total surface area of all the alveoli in the human lungs is very large. It is estimated to be approximately the size of a tennis court, which is significantly larger than the other options provided (dining table, dinner plate, small bowl).

5. **Conclusion**:
- Based on the information about the structure and function of alveoli, the correct answer to the question is that the surface area of the human lung is approximately the size of a **tennis court**.

### Answer:
The surface area of the human lung, due to the presence of alveoli, is approximately the size of a **tennis court**.

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