what body system are pleura
Visceral Pleura. The visceral pleura covers the outer surface of the lungs, and extends into the interlobar fissures. It is continuous with the parietal pleura at the hilum of each lung (this is where structures enter and leave the lung). Pleural Cavity. The pleural cavity is a potential space between the parietal and visceral pleura. It contains a small volume of serous fluid, which has two major functions. It lubricates the surfaces of the pleurae, allowing them to slide over each other.