Simple squamous non-ciliated epithelium is found in :

Options

A. alveoli
B. bronchi
C. bronchioles
D. trachea

Explanation

### Step-by-Step Solution

1. **Understanding Epithelial Tissue**: Epithelial tissue is a type of tissue in the body that consists of closely packed cells. It serves as a lining for organs and covers surfaces. Epithelial tissue can be classified based on the number of cell layers and the shape of the cells.

2. **Classification of Epithelial Tissue**:
- **Simple Epithelium**: This consists of a single layer of cells.
- **Compound Epithelium**: This consists of multiple layers of cells.
- **Ciliated Epithelium**: This type has hair-like structures called cilia, which help in moving substances.

3. **Focus on Simple Squamous Non-Ciliated Epithelium**:
- "Simple" indicates a single layer of cells.
- "Squamous" refers to flattened cells.
- "Non-ciliated" means that these cells do not have cilia.

4. **Location of Simple Squamous Non-Ciliated Epithelium**: The question asks where this type of epithelium is found. The primary location for simple squamous non-ciliated epithelium is in the **alveoli** of the lungs.

5. **Function of Alveoli**: Alveoli are small air sacs in the lungs where the exchange of gases (oxygen and carbon dioxide) occurs. The thin walls of the alveoli, composed of simple squamous epithelium, facilitate efficient gas exchange through diffusion.

6. **Conclusion**: Therefore, the correct answer to the question is that simple squamous non-ciliated epithelium is found in the **alveoli** of the lungs.