Which serous membrane lines the abdominal cavity and covers abdominal organs?

• A. Parietal pleura
• B. Visceral pleura
• C. Pericardium
• D. Peritoneum

Answer: (D)

The abdominal serous membrane is the peritoneum. It’s a continuous sheet with two layers: the parietal peritoneum lines the abdominal cavity, and the visceral peritoneum covers the abdominal organs. This membrane forms folds that suspend and organize the viscera (mesenteries, omenta, ligaments) and secretes serous fluid to reduce friction as organs move. The other membranes listed belong to the thoracic area or around the heart, not to the abdomen.