Question

The cells constituting walls of the blood capillaries are known as ?

• A. Parietal cells
• B. Haemocytes
• C. Oxyntic cells
• D. Endothelial cells

Answer 1

The correct option is D Endothelial cells

Capillaries are smallest of all blood vessels and their wall is made up of single layer of epithelial cells known as endothelium. They enable the exchange of water, Oxygen, Carbon dioxide, and many other nutrients and waste substances between the blood and the tissues.

So, the correct answer is 'Endothelial cells'