Source:http://linkedlifedata.com/resource/umls/id/C0927234
FMA: Organ with organ cavity, which consists of an arborizing set of tubular organ parts, the walls of which are continuous and surround a continuous lumen. Examples: systemic arterial tree (organ), tracheobronchial tree, biliary tree.,UWDA: Organ with organ cavity, which consists of an arborizing set of tubular organ parts, the walls of which are contiguous and surround a continuous lumen. Examples: systemic arterial tree (organ), tracheobronchial tree, biliary tree.