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Mandatory Credit: Photo by Mint Images/REX (1969592a) Cross section through human hand showing blood veins, Museum Boerhaave, Leiden, Netherlands VARIOUS

Mandatory Credit: Photo by Mint Images/REX (1969592a) Cross section through human hand showing blood veins, Museum Boerhaave, Leiden, Netherlands VARIOUS

Mandatory Credit: Photo by Mint Images/REX (1969592a)
Cross section through human hand showing blood veins, Museum Boerhaave, Leiden, Netherlands
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