What is the pleura?

The pleura is indeed a serous membrane that plays a crucial role in the respiratory system. It surrounds the lungs and consists of two layers: the visceral pleura, which is attached directly to the lung surface, and the parietal pleura, which lines the chest wall and diaphragm. The serous fluid produced by this membrane serves several important functions. It reduces friction during breathing, allowing the lungs to expand and contract smoothly within the thoracic cavity. Additionally, this pleural fluid helps to create surface tension, which assists in keeping the lungs inflated during the process of respiration. This unique structure is vital for efficient lung function and overall respiratory health.