what's the outer membrane which covers the lungs
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.