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I wish people would give more that 5 points away because that would be much more helpful
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Hemoglobin is a proton that carries oxygen around your body what is hemoglobin made from
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Veins have a much lower blood pressure than arteries. which of these prevents backflow of blood in veins? a. pressure applied by the heart b. one–way valves in veins c. thin muscular walls of veins
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I wish people would give more that 5 points away because that would be much more helpful...
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