part_of part of part of Viridiplantae Metazoa Fungi organ organ part UBERON:0000064 uberon AAO:0011124 SCTID:113343008 BIRNLEX:16 FMA:82472 cardinal organ part A multicellular structure that is a part of an organ. currently defined in a very broad sense, may be replaced by more specific classes in the future SCTID:91717005 regional part of organ EFO:0000635 multicellular anatomical structure