Source:http://linkedlifedata.com/resource/umls/id/C1180135
FMA: Cardinal organ part which is a fiat subdivision of an organ. Examples: lingula of left lung, tail of pancreas, artery, trochanter, nodulus of semilunar valve, right side of heart, duodenum, fundus of stomach.,UWDA: Organ part which consists of organ subdivisions or organ component. Examples: muscle belly and tendon of muscle, cardiac chamber and cardiac valve.