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The Blood Vessels of A Hand Did you know that your blood vessels could circle the globe? Though the blood vessels are quite small, the network they make is amazingly long. If they are laid out in a line, they would be more than 60,000 miles in length. As the earth has a circumference of 24,873.6 miles, your blood vessels can easily circle more than twice. Isn't it amazing ((After seeing this photo, we tried to make a pun, but all our efforts went in "vein."))