From Wikipedia, the free encyclopedia. The peritoneal cavity is a potential space between the parietal peritoneum and visceral peritoneum, that is, the two membranes that separate the organs in the abdominal cavity from the abdominal wall.he peritoneal cavity is the largest serosal sac in the body and secretes approximately 50 ml of fluid per day. This fluid acts as a lubricant and has anti-inflammatory properties.
The appendix is located in the lower right portion of the abdomen.The spleen is tucked under the left side of the diaphragm.
Right side, near the pubic bone is the Appendix. The liver and pancreas are nowhere near that location. The pancreas is below your left breast and the liver is mostly below your right breast with some of it towards your left. They are both near the lower edge of the rib cage.