What is the name of the cavity that contains the kidneys?
The kidneys are located behind (posterior to) the abdominal cavity, in the retroperotoneum. Yes, the kidneys are located outside of the peritoneal cavity. In anatomy, they are â¦ referred to as being retroperitoneal.idneys are retroperitoneal and so lie between the peritoneum and the abdominal wall, in the retroperitoneal space (a part of the abdominal cavity). 2 people found this useful. Edit. Share to: 1  Attempting a Kidney Detox Diet Your kidneys are designed to filter your bloodstream of unneeded waste and water.