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Your blood can circle your body in 20 seconds

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Meanwhile, you take forty-five minutes just to get out of bed. A single red blood cell completes a full circuit of your body—from the heart, to the toes, to the lungs, and back—in under half a minute. Your circulatory system is pulling off an anatomical Formula 1 race 24/7 without you even noticing.

Your blood can circle your body in 20 seconds
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