Source:http://linkedlifedata.com/resource/umls/id/C0227411
FMA: Organ with organ cavity which is continuous proximally with the rectum and distally terminates with the anus. Examples: There is only one anal canal.,UWDA: Organ with organ cavity which is continuous proximally with the rectum and distally terminates with the anus. Examples: There is only one anal canal.,NCI: The terminal section of the alimentary canal, which extends from the anorectal junction and ends at the anal opening.,MSH: The terminal segment of the LARGE INTESTINE, beginning from the ampulla of the RECTUM and ending at the anus.