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The serous membranes have two segments - the visceral segment (which house the internal organs) and the parietal segment (which line the body wall). The serous membranes that take care of the lungs are called pleurae, and those that look after the abdominal cavity are called peritoneum (or peritoneal membranes).
Endothelium is the internal lining of your blood vessels 10. Viscera a. A delicate layer called a serous membrane lines the walls of these internal cavities and covers the surfaces of the enclosed viscera. 11. Thoracic Cavity a. Each pleural cavity, which contains a lung, is lined by a shiny, slippery serous membrane that reduces the friction as the lung expands and recoils during respiration. b. The serous membrane lining a pleural cavity is called pleura. The visceral pleura covers the outer surfaces of the lung, the parietal pleura covers the inner surfaces of the lung. c.