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Your Heart and How it Works Your heart is a vital organ. It is a muscle that pumps blood to all parts of your body. The blood pumped by your heart provides your body with the oxygen and nourishment it needs to keep you a
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Document Date: 2011-10-24 06:58:56
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Your Heart and How it Works Your heart is a vital organ. It is a muscle that pumps blood to all parts of your body. The blood pumped by your heart provides your body with the oxygen and nourishment it needs to keep you a