Simple epithelium is made of

Options

A. Non-cellular layer of hyaluronic acid
B. Actively dividing cells
C. Loosely arranged cells
D. Compactly packed single layer of cells

Answer

**Step-by-Step Text Solution:**

1. **Understanding Simple Epithelium**: Simple epithelium is a type of epithelial tissue characterized by a single layer of cells. It is important to recognize that the term "simple" refers to the number of cell layers.

2. **Analyzing the Options**: The question provides four options regarding what simple epithelium is made of:
- Option 1: Non-cellular layer of hyaluronic acid
- Option 2: Actively dividing cells
- Option 3: Loosely arranged cells
- Option 4: Compactly packed single layer of cells

3. **Identifying the Correct Option**: Among the options, the most accurate description of simple epithelium is:
- **Option 4: Compactly packed single layer of cells**. This indicates that the cells are closely arranged in a single layer, which is characteristic of simple epithelium.

4. **Function of Simple Epithelium**: Simple epithelium serves various functions, including secretion and absorption. For example, in the alveoli of the lungs, simple squamous epithelium facilitates the exchange of gases (oxygen and carbon dioxide) due to its thin structure.

5. **Location of Simple Epithelium**: Simple epithelium can be found lining various body cavities and structures, such as blood vessels (capillaries) and alveoli in the lungs. This positioning allows for efficient exchange and secretion processes.

6. **Conclusion**: Therefore, the correct answer to the question "Simple epithelium is made of" is **Option 4: Compactly packed single layer of cells**.

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