The relationship of viscera to peritoneum cavity Mesentery Peritoneal cavity Parietal layer 1.Intraperitoneal Peritoneum Visceral layer structures Intraperitoneal organ 2.Retroperitoneal Subperitoneal Structures The relationship of viscera to peritoneum cavity 1.Intraperitoneal structures 2.Retroperitoneal & Subperitoneal Structures