Which of the following parts is absent in the left lung of humans?

Options

A. Middle lobe
B. Inferior lobe
C. Superior lobe
D. None of these

Answer

To solve the question regarding which part is absent in the left lung of humans, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Structure of the Lungs**:
- Humans have two lungs: the right lung and the left lung.
- The right lung is larger and has three lobes: the right upper lobe, right middle lobe, and right lower lobe.
- The left lung is smaller and has only two lobes: the left upper lobe and left lower lobe.

2. **Identify the Difference**:
- The key difference between the right and left lung is the presence of the middle lobe.
- The left lung does not have a middle lobe, which is present in the right lung.

3. **Conclusion**:
- Since the left lung lacks the middle lobe, the answer to the question is that the **middle lobe** is the part that is absent in the left lung of humans.

### Final Answer:
The part that is absent in the left lung of humans is the **middle lobe**.

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