Which vessels carry blood back to the heart?

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Multiple Choice

Which vessels carry blood back to the heart?

Explanation:
Blood returns to the heart through the network of veins. Veins have thinner walls and larger lumens, and they often contain valves to prevent backflow as blood moves back toward the heart under low pressure. This return flow is a key part of both systemic and pulmonary circulation. In contrast, arteries carry blood away from the heart, capillaries are the tiny vessels where exchange of gases and nutrients occurs between blood and tissues, and nerves are not blood vessels at all.

Blood returns to the heart through the network of veins. Veins have thinner walls and larger lumens, and they often contain valves to prevent backflow as blood moves back toward the heart under low pressure. This return flow is a key part of both systemic and pulmonary circulation. In contrast, arteries carry blood away from the heart, capillaries are the tiny vessels where exchange of gases and nutrients occurs between blood and tissues, and nerves are not blood vessels at all.

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