part_of part of part of located in located in located_in only in taxon only_in_taxon develops from develops from has potential to develop into has potential to develop into Eumetazoa ectoderm proctodeum uberon proctodaeum Wikipedia:Proctodeum UMLS:C0231054 Inward fold on the surface of the embryonic ectoderm that develops into an ectodermal terminal part of the digestive tract. TAO:0000066 NCIT:C34278 AAO:0011087 ZFA:0000066 XAO:0001019 UBERON:0000931 embryonic proctodaeum EMAPA:25038 EHDAA2:0000121 VHOG:0000139 anal region presumptive gut external anal region pit