<prompt> Endodermal cloaca gives rise to all of the following exceptRectumLower 12 of anal canalUpper 12 of anal canalMucous membrane of bladder  <response>: The pa of the hindgut caudal to the attachment of the allantoic diveiculum is called the cloaca. The cloaca soon shows a subdivision into a broad ventral pa and a narrow dorsal pa. These two pas are separated from each other by the formation of the urorectal septum, which is first formed in the angle between the allantois and the cloaca. Derivatives of Hindgut - Preallantoic pa: Left one-third of transverse colon, Postallantoic pa: It forms a dilated endodermal cloaca which is divided by urorectal septum into a dorsal pa primitive rectum and a ventral pa primitive urogenital sinus. Rectum Upper pa of anal canal Pas of the urogenital system derived from the primitive urogenital sinus. Ref: Inderbir Singhs Human Embryology, eleventh edition, pg. no., 173, 175. 