Which type of blood vessel contains walls that are composed of a single layer of endothelial cells and a basement membrane?

Question

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Capillaries have walls that are composed of a single layer of endothelial cells and a basement membrane, which allows for easy exchange of nutrients and gases between the blood and surrounding tissues. The walls of venules, arterioles, arteries, and veins are composed of multiple layers of tissue, including smooth muscle and connective tissue.

Which Type of Blood Vessel Contains Walls That Are Composed