Total surface area of human alveoli in lungs is

Options

A. `1 m^2`
B. `10 m^2`
C. `100 m^2`
D. `1000 m^2`

Answer

To determine the total surface area of human alveoli in the lungs, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding the Structure of the Lungs**:
- The lungs are vital organs in the respiratory system, designed to facilitate gas exchange. They contain numerous small air sacs called alveoli, which are the primary sites for this exchange.

2. **Function of Alveoli**:
- Alveoli are responsible for the exchange of oxygen and carbon dioxide between the air we breathe and the blood. Their structure is adapted to maximize this exchange.

3. **Characteristics of Alveoli**:
- Alveoli have thin walls and are highly vascularized, meaning they have a rich supply of blood vessels. This structure allows for efficient gas exchange.

4. **Surface Area of Alveoli**:
- The total surface area of all the alveoli in the human lungs is significantly large. This is crucial because a larger surface area allows for a greater amount of gas exchange to occur.

5. **Quantifying the Surface Area**:
- Research and anatomical studies indicate that the total surface area of the alveoli in a healthy human lung is approximately **100 square meters (m²)**. This large area is essential for meeting the oxygen demands of the body and efficiently removing carbon dioxide.

6. **Conclusion**:
- Therefore, the total surface area of human alveoli in the lungs is around **100 m²**.

### Final Answer:
The total surface area of human alveoli in the lungs is approximately **100 m²**.

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