The alveolar epithelium in the lung is

Options

A. cilitate columnar
B. cilitated squamous
C. nonciliated squamous
D. noncillated columnar

Answer

To answer the question about the type of epithelium found in the alveoli of the lungs, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Structure of Alveoli**:
- Alveoli are small, sac-like structures in the lungs where gas exchange occurs. They are the terminal ends of the respiratory bronchioles.

2. **Identify the Type of Epithelium**:
- The epithelium lining the alveoli is crucial for efficient gas exchange. It needs to be thin to facilitate the diffusion of oxygen and carbon dioxide.

3. **Consider the Options Given**:
- The options provided are:
- A) Ciliated columnar
- B) Ciliated squamous
- C) Non-ciliated squamous
- D) Non-ciliated columnar

4. **Analyze Each Option**:
- **Ciliated columnar**: This type of epithelium is typically found in the respiratory tract but not in the alveoli.
- **Ciliated squamous**: While squamous cells are present, they are not ciliated in the alveoli.
- **Non-ciliated squamous**: This is the correct type of epithelium found in the alveoli. The squamous cells are flat and allow for efficient gas exchange.
- **Non-ciliated columnar**: This type is not found in the alveoli; the cells are not columnar but squamous.

5. **Conclusion**:
- After analyzing the options, the correct answer is **C) Non-ciliated squamous**. This type of epithelium is essential for the function of the alveoli in gas exchange.

### Final Answer:
The alveolar epithelium in the lung is **non-ciliated squamous**.