Endothelium of blood vessels is made up of :

Options

A. Simple cuboidal epithelium
B. Simple squamous epithelium
C. Simple columnar epithelium
D. Simple non-ciliated columnar epithelium

Answer

**Step-by-Step Solution:**

1. **Understanding Endothelium**: The endothelium is a specialized type of epithelium that lines the interior surface of blood vessels. It plays a crucial role in vascular biology.

2. **Identifying the Type of Cells**: The endothelium consists of a single layer of cells. The specific type of cells that form the endothelium are important to identify.

3. **Analyzing the Options**:
- **Option 1: Simple Cuboidal Epithelium**: This type of epithelium consists of cube-shaped cells and is not found in blood vessels. Therefore, this option is incorrect.
- **Option 2: Simple Squamous Epithelium**: This type of epithelium consists of flat, scale-like cells and is indeed what makes up the endothelium of blood vessels. This option is correct.
- **Option 3: Simple Columnar Epithelium**: This type consists of column-shaped cells and is typically found in the digestive tract, not in blood vessels. Thus, this option is incorrect.
- **Option 4: Simple Non-Ciliated Columnar Epithelium**: This type of epithelium is involved in absorption and secretion and is found in the uterus, making this option also incorrect.

4. **Conclusion**: Based on the analysis, the endothelium of blood vessels is made up of **Simple Squamous Epithelium**.

**Final Answer**: The endothelium of blood vessels is made up of **Simple Squamous Epithelium**.

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