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Q:5 answer in one word 1 what are veins |
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Answer» Answer: Any of the blood vessels that carry blood toward the heart from the BODY's CELLS, tissues, and ORGANS. Veins are thin-walled and contain valves that PREVENT the backflow of blood. All veins except the pulmonary VEIN carry blood with low levels of oxygen. Explanation: I hope it help you |
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