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.
Location of Appendix. The location of the appendix is in the lower right quadrant of your abdomen. If you place your hand on your abdomen with the tip of your little finger just touching your pelvic bone and your thumb at your navel, your appendix is right under there usually about where your middle finger lands. Do not push.