Which term describes the smallest vessels that connect arteries and veins?

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Multiple Choice

Which term describes the smallest vessels that connect arteries and veins?

Explanation:
Capillaries are the tiniest vessels that connect arteries and veins, forming the site of exchange in the body's microcirculation. Their walls are only one cell thick, which allows oxygen and nutrients to pass from the blood into nearby tissues and carbon dioxide and wastes to move from tissues into the blood. Arteries carry blood away from the heart and veins bring it back, but their larger size and thicker walls aren’t suited for the direct exchange that happens in capillaries. The larynx is a part of the airway, not a blood vessel, so it doesn’t fit this description.

Capillaries are the tiniest vessels that connect arteries and veins, forming the site of exchange in the body's microcirculation. Their walls are only one cell thick, which allows oxygen and nutrients to pass from the blood into nearby tissues and carbon dioxide and wastes to move from tissues into the blood. Arteries carry blood away from the heart and veins bring it back, but their larger size and thicker walls aren’t suited for the direct exchange that happens in capillaries. The larynx is a part of the airway, not a blood vessel, so it doesn’t fit this description.

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