The kind of epithelium which forms inner walls of blood vessels is

Options

A. Columnar epithelium
B. Ciliated columnar epithelium
C. Squamous epithelium
D. Cuboidal epithelium .

Answer

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks for the type of epithelium that forms the inner walls of blood vessels.

2. **Identifying the Options**: We need to evaluate the given options to determine which type of epithelium is present in blood vessels. The options are:
- Columnar epithelium
- Ciliated columnar epithelium
- Squamous epithelium
- Cuboidal epithelium

3. **Evaluating Columnar Epithelium**:
- Columnar epithelium is primarily found in the digestive tract.
- Since it is not found in blood vessels, this option is incorrect.

4. **Evaluating Ciliated Columnar Epithelium**:
- Ciliated columnar epithelium is located in the respiratory tract.
- As it is not present in blood vessels, this option is also incorrect.

5. **Evaluating Squamous Epithelium**:
- Squamous epithelium is thin and flat, making it suitable for areas where diffusion and filtration occur, such as in blood vessels and alveoli.
- This type of epithelium is indeed present in the inner walls of blood vessels, making this option correct.

6. **Evaluating Cuboidal Epithelium**:
- Cuboidal epithelium is typically found in glandular tissues and the excretory ducts.
- Since it is not found in blood vessels, this option is incorrect.

7. **Conclusion**: The correct answer is **Squamous epithelium**, as it forms the inner walls of blood vessels.

---