part_of part of part of only_in_taxon only in taxon Vertebrata <Metazoa> Vertebrata <vertebrates> cloaca uberon SCTID:362857006 Common chamber into which the intestines and excretory system opens. Arises during development in all vertebrates, but in many it becomes subdivided, lost or incorporated into other structures. UBERON:0000162 vent VHOG:0001186 Anatomical structure which is the common receptacle for the alimentary canal, Wolffian ducts, oviducts, and the bladder.[AAO] SCTID:370631000 hindgut endoderm and proctodeal ectoderm. Wikipedia:Cloaca Common chamber into which the intestines and excretory system opens. Arises during development in all vertebrates, but in many it becomes subdivided, lost or incorporated into other structures A cloaca is apparently a primitive vertebrate feature because it occurs in most primitive gnathostomes and persists in the embryos of almost all vertebrates.[well established][VHOG] Human beings only have an embryonic cloaca, which is split up into separate tracts during the development of the urinary and reproductive organs UMLS:C0008987 MESH:D002988 GAID:1206 cloacal chamber AAO:0000095 XAO:0000244 A common passage for fecal, urinary, and reproductive discharge in most lower vertebrates as well as the terminal end of the hindgut before division into rectum, bladder, and genital primordia in mammalian embryos. [TFD][VHOG] cloacal adding df link to embryonic cloaca leads to a cycle in uberon-simple, as cloaca is a suberclass of embryonic cloaca NCIT:C34127 ZFA:0005781 digestive tract genitourinary system subdivision of tube