What does the pleural linkage refer to?

The pleural linkage refers to the anatomical relationship established by the pleural membranes, which consist of two layers: the visceral pleura that covers the lungs and the parietal pleura that lines the rib cage. This pleural system creates a sealed environment that allows the lungs to expand and contract during respiration. When the thoracic cavity expands, the negative pressure within the pleural space helps to pull the lungs outward, facilitating inhalation. Similarly, when the thoracic cavity contracts, the elasticity of the lungs aids in exhalation. This linkage is crucial for effective breathing and overall respiratory function, as it provides the physical connection necessary for lung movement in relation to the thoracic wall.