The pleural space is the space between the inner and outer lining of the lung. It is normally very thin, and lined only with a very small amount of fluid.
Review Date 7/6/2022
Updated by: Jesse Borke, MD, CPE, FAAEM, FACEP, Attending Physician at Kaiser Permanente, Orange County, CA. Also reviewed by David C. Dugdale, MD, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.