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.

The inner layer of a multilayered membrane that protects and holds the organs of the abdominal cavity in place: The visceral peritoneum forms a complete covering that is wrapped around the internal organs including the lower part of the esophagus, the stomach, small intestine, colon, rectum, liver, gallbladder, pancreas, spleen, kidneys, and bladder.