Set of 23 X-ray prints on 12 sheets, 11, 3/4" x 8, 1/4" (30cm x 21cm). Look at bone growth in the hand, how a fractured leg heals, follow food along the intestine and see how teeth develop. Special techniques even show the stomach, blood vessels and other internal organs. Includes an X-ray of a broken leg. 12 page guide with interpretations of the X-rays.