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Blood flowing through the human circulatory system moves nutrients and oxygen to cells and carries waste and carbon dioxide away from cells how are the circulatory system and the respiratory system related in humans
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Blood flowing through the human circulatory system moves nutrients and oxygen to cells and carries waste and carbon dioxide away from cells how are the circulat class=

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A, the respiratory system gives oxygen to the heart which is needed to oxygenate blood
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A, the respiratory system because it transfers oxygen to the heart which is needed to oxygenate blood

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