MEHAU KULYK / SCIENCE PHOTO LIBRARY MEHAU KULYK / SCIENCE PHOTO LIBRARY
Hand. Computer-enhanced historical artwork of the blood supply to the human hand. The skeleton of a right hand is seen covered with branching networks of blood vessels around the bones of the palm and fingers. Blood is supplied to the hand by two arteries: the radial on the thumb side of the wrist and the ulnar on the little finger side. Prominent networks of veins on the back of the hand carry blood away. The hand is the most versatile part of the human body, allowing the holding and manipulation of objects. Drawing by the celebrated Italian anatomist, Paolo Mascagni (1755-1815).
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