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.
Answers From Experts & Organizations (1) SUCCESS! A. The appendix is a thin tube about 4 inches long that protrudes off the large intestine where it joins the small intestine. In most people, the appendix is located in the lower right part of the abdomen (belly). The exact location of the appendix can vary somewhat. This answer should not be considered medical advice...This answer should not be considered medical advice and should not take the place of a doctorâs visit.