This action decreases pressure and increases the space in the thoracic cavity, allowing your lungs to expand as you inhale. When the diaphragm relaxes, your chest cavity becomes smaller and your lungs ...
The pleura is a two-layered membrane that covers the lung. Between the layers is a small amount of lubricating fluid, known as pleural fluid, which helps cushion the lung and reduce friction ...
The intrapleural space contains roughly 4 to 5 cubic centimeters (ccs) of pleural fluid. The pleura fluid has a slightly sticky quality that helps draw the lungs outward during inhalation rather than ...