The total number of lobes and alveoli present in both the lungs of man are

Options

A. 17 and 30 million, respectively
B. 5 and 300 million, respectively
C. 19 and 300 million, respectively
D. 18 and 300 lakh, respectively

Answer

To solve the question regarding the total number of lobes and alveoli present in both the lungs of a human, we can follow these steps:

### Step 1: Identify the Number of Lobes in the Lungs
- The human lungs are divided into lobes. The left lung has 2 lobes, while the right lung has 3 lobes.
- Therefore, the total number of lobes in both lungs is:
\[ \text{Total Lobes} = \text{Lobes in Left Lung} + \text{Lobes in Right Lung} = 2 + 3 = 5 \]

### Step 2: Identify the Number of Alveoli in the Lungs
- Alveoli are tiny air sacs in the lungs where gas exchange occurs.
- The total number of alveoli in both lungs of a human is approximately 300 million.

### Step 3: Combine the Results
- Now that we have both the number of lobes and the number of alveoli, we can summarize our findings:
- Total number of lobes: 5
- Total number of alveoli: 300 million

### Conclusion
- Therefore, the total number of lobes and alveoli present in both the lungs of man are **5 and 300 million respectively**.

### Final Answer
- The correct option is **5 and 300 million respectively**.

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