Pleural Cavity

The pleural cavity is a thin space between the two layers, or membranes, of the pleura, which is the thin, sac-like tissue that surrounds the lungs. It is responsible for maintaining a certain level of pressure inside the lungs. This pressure is necessary for breathing, as it allows air to enter and exit the lungs as we take in oxygen and release carbon dioxide. The pleural cavity also contains a small amount of fluid, which acts as a lubricant and allows the pleura to move easily against each other. Its significance is that the inner pressure it creates and the lubrication it provides ensures the efficient functioning of the lungs. It is sometimes used to diagnose and treat some respiratory illnesses, and can also be used to identify potential cysts and tumors.