Examine the structure of blood vessels in the following figure.Which one of the following has the structure best suited to chemical exchange between the blood and tissues?

Question

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Capillaries have a structure best suited for chemical exchange between the blood and tissues due to their thin walls (only one layer of endothelial cells) and their extensive branching network, which ensures that each tissue cell is close to a capillary. This allows for efficient diffusion of oxygen, nutrients, and wastes between the blood and surrounding tissues. Venules, arterioles, and arteries all have thicker walls and less extensive branching networks, and are involved in other functions such as regulating blood flow and blood pressure.

Examine the Structure of Blood Vessels in the Following Figure