SCOTT CAMAZINE, SUE TRAINOR / SCIENCE PHOTO LIBRARY SCOTT CAMAZINE, SUE TRAINOR / SCIENCE PHOTO LIBRARY
Child's hand. Image 1 of 3. Coloured X-ray of the hand of a 2-year-old child, showing the developing bones (dark blue). The bones in the fingers (phalanges) and the bones in the palm (metacarpals) are separated by spaces filled with cartilage (not seen). The cartilage will be replaced by bone as the child grows. Only four wrist bones (lower centre) are seen here. In adults the wrist joint is composed of eight bones, but in a child of this age several are still formed from cartilage. For X-rays of a child's hand at seven years and twelve years, see images P116/450 and 451 respectively.
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