The smooth serous membrane which lines the cavity of the abdomen, or the whole body cavity when there is no diaphragm, and, turning back, surrounds the viscera, forming a closed, or nearly closed, sac.
An active membrane that lines the abdominal cavity and serves as both a secretory organ and a structure that modulates diffusion and osmosis. Adhesions may form between the peritoneal surface and various organs.
A sac that lines the walls of the inside of your abdomen. Most of your inner organs (and your digestive system) are contained within this sac. In certain types of cancer, the cancer cells can spread to this sac.
Endothelial lining of the abdominal cavity, the parietal peritoneum covering the inside of the abdominal wall and the visceral peritoneum covering the bowel, the mesentery, and certain of the organs. The portion that covers the bowel becomes the serosal layer of the bowel wall.
In higher vertebrates, the peritoneum is the serous membrane that forms the lining of the abdominal cavity - it covers most of the intra-abdominal organs. It is composed of layer of mesothelium supported by a thin layer of connective tissue.