MeSH definition : Paired but separate cavity within the THORACIC CAVITY. It consists of the space between
the parietal and visceral PLEURA and normally contains a capillary layer of serous
fluid that lubricates the pleural surfaces.;
Paired but separate cavity within the THORACIC CAVITY. It consists of the space between
the parietal and visceral PLEURA and normally contains a capillary layer of serous
fluid that lubricates the pleural surfaces.