Question

The endothelium of the blood vessel is composed of:

• A. Ciliated Epithelium
• B. Columnar Epithelium
• C. Cuboidal Epithelium
• D. Squamous Epithelium

Answer 1

The correct option is D

Squamous Epithelium

The correct option is D.

Explanation of the correct option:

1. Endothelium is a thin layer of flat cells that will form the interior lining of the blood vessels as well as the lymphatic vessels.
2. Epithelium are the tissues that will line the outer surface as well as the inner surface of the organs, the blood vessels, and the cavities of many internal organs.
3. Squamous epithelium is composed of cells that are flat and wider than their height.
4. Squamous cells are large, thin, and flat and will consist of a rounded nucleus.
5. They have a polarity and also a distinct apical surface with specialized membrane proteins.

Explanation of the incorrect options:

Option A:

1. It is a thin tissue having a hair-like structure on it, and these hair are known as cilia that will move back and forth helping the particles of the body to move.
2. It performs the function of moving the fluid or the particles over the epithelial surface.

Option B:

1. This epithelium covers the intestinal tract from the end of the esophagus to the start or the beginning of the end part which is the rectum.
2. It is involved in the functions such as secretion, excretion, and absorption.

Option C:

1. Cuboidal epithelium consists of one or more layers of cells that are cuboidal or polyhedral in shape.
2. This epithelium also helps in the functions such as secretion, transportation in the glands as well as filtration in the kidneys.

Final answer: The endothelium of the blood vessel is composed of squamous epithelium.