part of part of distalmost part of continuous with continuous with contributes to morphology of Homo sapiens large intestine rectum http://upload.wikimedia.org/wikipedia/commons/7/75/Anorectum.gif https://cdn.humanatlas.io/digital-objects/ref-organ/large-intestine-female/v1.3/assets/3d-sbu-f-large-intestine.glb https://cdn.humanatlas.io/digital-objects/ref-organ/large-intestine-male/v1.3/assets/3d-sbu-m-large-intestine.glb EV:0100081 XAO:0000238 MAT:0000050 Wikipedia:Rectum GAID:311 EHDAA:5836 intestinum rectum terminal portion of large intestine rectal galen:Rectum CALOHA:TS-1180 SCTID:181261002 NCIT:C12390 EFO:0000848 In the lungfish, sharks and rays the rectum opens into the cloaca which also receives wastes (urine) from the kidneys and material from the reproductive organs. In bony fish the rectum reaches the outside environment through the anus, which is normally situated just in front the urinary and reproductive openings. However in some fish the digestive tract may be curled back on itself, and in the Electric Eel (Electrophorus electricus) the anus is situated in the fish's throat. -- http://www.earthlife.net/fish/digestion.html MIAA:0000050 VHOG:0001751 MESH:D012007 terminal portion of intestine EMAPA:17896 BTO:0001158 The terminal portion of the large intestine between the ileo-pelvic colon and the anus. [Dorian_AF, Elsevier's_encyclopaedic_dictionary_of_medicine, Part_B:_Anatomy_(1988)_Amsterdam_etc.:_Elsevier][VHOG] The terminal portion of the intestinal tube, terminating with the anus. AAO:0010401 EHDAA2:0001592 FMA:14544 UMLS:C0034896 UBERON:0001052 rectal sac MA:0000336 sigmoid colon subdivision of digestive tract terminal part of digestive tract internal anal region