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The alveoli of the lungs are lined with...

The alveoli of the lungs are lined with

A

cuboidal epithelium

B

columnar epithelim

C

squamous epithelium

D

ciliated epithelium

Text Solution

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The correct Answer is:
**Step-by-Step Solution:** 1. **Understanding the Structure of Alveoli**: The alveoli are tiny air sacs in the lungs where gas exchange occurs. They have a very thin wall to facilitate this process. 2. **Identifying the Type of Epithelium**: The options given are cuboidal epithelium, columnar epithelium, squamous epithelium, and ciliated epithelium. To determine which type lines the alveoli, we need to consider the characteristics of each type. 3. **Analyzing Squamous Epithelium**: Squamous epithelium is characterized by its flat and thin cells. This type of epithelium is ideal for areas where diffusion and filtration occur, such as in the alveoli, where oxygen and carbon dioxide exchange takes place. 4. **Confirming the Function**: The simple squamous epithelium lining the alveoli allows for efficient gas exchange due to its thinness, which minimizes the distance gases must travel. 5. **Conclusion**: Based on the structure and function of the alveoli, the correct answer to the question is that the alveoli of the lungs are lined with **simple squamous epithelium**. ---
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