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How far does human blood travel in one day?

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Inside a network of blood vessels (arteries, arterioles, capillaries, veins, venules). While the length of some of these blood vessels are minuscule, if you could add all their lengths together, that would make 100 000 km in an avarage human body. And that's about twice the circumference of the Earth ! More info could be find on http://en.wikipedia.org/wiki/Blood_vessel

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