Source:http://linkedlifedata.com/resource/umls/id/C0008987
MSH: A dilated cavity extended caudally from the hindgut. In adult birds, reptiles, amphibians, and many fishes but few mammals, cloaca is a common chamber into which the digestive, urinary and reproductive tracts discharge their contents. In most mammals, cloaca gives rise to LARGE INTESTINE; URINARY BLADDER; and GENITALIA.,NCI: The singular posterior opening of the intestinal and urinary tracts of birds, reptiles, amphibians, marsupials and monotremes. (NCI),NCI: The singular posterior opening of the intestinal and urinary tracts of birds, reptiles, amphibians, marsupials and monotremes.