MICHAEL ENGLISH, CUSTOM MEDICAL STOCK PHOTO / SCIENCE PHOTO LIBRARY MICHAEL ENGLISH, CUSTOM MEDICAL STOCK PHOTO / SCIENCE PHOTO LIBRARY
Hand bones. Coloured X-ray of the bones in a healthy human hand. At top are the eight small carpal bones of the wrist. These articulate with the two long bones of the forearm (not seen). Five metacarpal bones (upper centre) make up the palm of the hand. The thumb is at left. Each finger is made up of phalanges bones (lower centre) which articulate with the metacarpals. This skeleton of bones enables the human hand to be used with great flexibility, helped especially by the joint between the wrist and the opposable thumb. It enables the wrist to be moved up and down, side to side, as well as to rotate in a circular motion.
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