The pleural cavity refers to the thin fluid-filled space between visceral pleura and parietal pleura of each lung. It is a potential space where two pleurae adhere to each other.
The outer pleura called parietal pleura, and it is attached to the inner surface of the thoracic cavity. The inner pleura called visceral pleura, and it covers the surface of each lung and adjoining structures.
Keywords: pleural cavity