Topic summary
Urinary bladder
Extracted from the Wikipedia article Bladder.
Reptiles
In all reptiles, the urinogenital ducts and the rectum both empty into the organ called the cloaca. In some reptiles, a midventral wall in the cloaca opens into a urinary bladder. The urinary bladder exists in all species of turtle and tortoise and most species of lizard. Monitor lizards, the legless lizards, snakes, alligators, and crocodiles do not have urinary bladders.