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.
Quick Answer. The appendix is located where the small and large intestines meet, projecting outward from the cecum, in the lower right portion of the abdomen. It is a narrow, tubular-shaped organ often described as resembling a worm or a finger. Continue Reading.