part of part of has 2D boundary has 2D boundary in taxon capable of capable of biological process biological_process Xenoturbella Viridiplantae Metazoa Fungi organ element EMAPA:35949 SCTID:272625005 CARO:0020004 FMA:67498 WBbt:0003760 CARO v1 does not include a generic 'organ' class, only simple and compound organ. CARO v2 may include organ, see https://github.com/obophenotype/caro/issues/4 body organ UBERON:0000062 anatomical unit MA:0003001 NCIT:C13018 BIRNLEX:4 Organs are commonly observed as visibly distinct structures, but may also exist as loosely associated clusters of cells that work together to perform a specific function or functions. EFO:0000634 UMLS:C0178784 Anatomical structure that performs a specific function or group of functions [WP]. Wikipedia:Organ_(anatomy) ENVO:01000162 anatomical system mesentery anatomical surface multicellular anatomical structure multi organ part structure