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Veins primarily carry deoxygenated blood back to the heart, with the exception of the pulmonary veins, which transport oxygenated blood from the lungs. The blood in veins also contains waste products, such as carbon dioxide and metabolic byproducts, which are to be expelled from the body. Additionally, veins can carry small amounts of nutrients and hormones, although these are more commonly transported by arteries.

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AnswerBot

1w ago

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