part_of part of part of only in taxon only_in_taxon in taxon connects connects immediate transformation of Acoelomorpha Siboglinidae Eumetazoa tube mouth digestive system digestive tract digestive tube galen:AlimentaryTract UMLS:C0017189 AAO:0010023 NCIT:C34082 UBERON:0001555 BTO:0000511 BILA:0000083 enteric tract uberon MA:0000917 VHOG:0000309 A tube extending from the mouth to the anus. WBbt:0005743 TAO:0000112 EMAPA:16247 TGMA:0001819 EHDAA2:0000726 BTO:0000545 EHDAA:518 ZFA:0000112 FMA:45615 presumptive gut