Parietal pleura, including its costal component (lining the inner surface of the rib cage), diaphragmatic component (covering the superior surface of the diaphragm), mediastinal component (lining the lateral walls of the mediastinum) and cervical component (extending into the neck above the first rib, also known as the pleural cupula).

Visceral pleura, which is intimately adherent to the surface of the lung and is continuous with the parietal pleura at the hilum.

The hilum, where the parietal and visceral pleura meet and where the bronchus, pulmonary arteries, and pulmonary veins enter and exit the lung.

The pleural space, a potential space between the parietal and visceral pleura layers that contains a thin film of lubricating fluid.