Source:http://linkedlifedata.com/resource/umls/id/C0932491
FMA: Anatomical cluster which has as its direct parts all or some members of two or more organ subclasses and one or more organ part subclasses which are grouped together according to some shared attributes. Examples: joint, internal ear, pharynx.,UWDA: Anatomical cluster which consists of all or some members of one or more organ subclasses and one or more organ part subclasses which are grouped together according to some shared attributes. Examples: joint, internal ear, pharynx.