- 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.
Peritoneum The peritoneum is a thin serous membrane that lines the walls of the abdominal and pelvic cavities and clothes the viscera
Pelvic Peritoneum The parietal peritoneum lines the pelvic walls and is reflected onto the pelvic viscera and becomes continuous with the visceral peritoneum.