Relationship between abdominopelvic viscera and peritoneum Interperitoneal (or secondarily peritoneal) organs three aspects of organ covered by peritoneum. such as Liver, urinary bladder, ascending descending colon, etc intraperitoneal viscera parietal peritoneum (small intestine) mesentery interperitoneal interperitoneal viscera descending colon) (ascending colon retroperitoneal viscera 〔 kidney) abdominal aorta inferior vena cavaRelationship between abdominopelvic viscera and peritoneum Interperitoneal (or secondarily peritoneal) organs three aspects of organ covered by peritoneum.such as: Liver,urinary bladder,ascending & descending colon, etc