GUSTOIMAGES / SCIENCE PHOTO LIBRARY GUSTOIMAGES / SCIENCE PHOTO LIBRARY
Hands, coloured X-ray. Flesh is blue and bones are yellow, orange and pink. Each finger has three phalanges bones (the thumb has two). The palm comprises five metacarpal bones, which articulate with the small bones of the wrist (carpals). The two bones of the lower arm are the ulna and the larger radius.
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