Final answer:
Pulmonary veins carry oxygenated blood from the lungs back to the heart for circulation.
Explanation:
Pulmonary veins carry oxygen-rich blood from the lungs back to the heart to be circulated throughout the body. Unlike most veins, pulmonary veins carry oxygenated blood due to their role in the pulmonary circuit, which involves the exchange of oxygen and carbon dioxide in the lungs.
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