X rays, for instance, are absorbed to {HEAD ~ differing degrees} by {TAIL ~ different internal organs}, and to the greatest degree by bones 
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X rays , for instance , are absorbed to { HEAD ~ differing degrees } by { TAIL ~ different internal organs } , and to the greatest degree by bones
OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH