Question

One cell thick vessels are called

• A. Arteries.
• B. Capillaries.
• C. Venus.
• D. Pulmonary artery.

Answer 1

The correct option is B

Capillaries.

The correct option is B.

Explanation for the correct option:

1. One cell thick vessels are the blood vessels that join arteries and veins are the tiniest and most abundant blood vessels, called capillaries.
2. They primarily serve the purpose of exchanging materials between the blood and tissue cells.
3. By releasing the carbon dioxide, it serves as a center of circulation where the oxygen is delivered to the tissue.

Explanation for the incorrect option:

Option A:

1. The network of blood vessels known as arteries is the conduit by which the physical body's many cells, tissues, and organs receive oxygenated blood from the gut.
2. Arteries have thicker, more rigid, and highly muscular walls.

Option C:

1. Veins are the blood channels that return deoxygenated blood from tissues or body components to the heart.
2. The walls of veins are thin and flexible.

Option D:

1. The right ventricle of the heart is where the pulmonary artery emerges.
2. Blood rich in carbon dioxide is transported to the lungs by the pulmonary artery.
3. In contrast to the other arteries, it transports deoxygenated blood.
4. Thick and elastic wall.

Final answer: One-cell thick vessels are called capillaries.