What is the lining of the lungs called?

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The lining of the lungs is called the pleura. This is a vital structure in the respiratory system, consisting of two layers: the visceral pleura, which adheres directly to the lung surface, and the parietal pleura, which lines the chest wall. The space between these two layers, known as the pleural cavity, contains pleural fluid that helps reduce friction during breathing and allows for smooth movement of the lungs as they expand and contract.

Other terms listed refer to different anatomical structures. The pericardium is the fibrous sac surrounding the heart, providing protection and anchoring it within the chest cavity. The peritoneum is a serous membrane that lines the abdominal cavity and covers the organs within it. The endocardium is the inner lining of the heart chambers and valves. Each of these structures serves distinct functions unrelated to the lungs, reinforcing why pleura is the correct term for the lining of the lungs.