Well that depends if you include the membrane of every columnar epithelial cell comprising the lungs.
Empyema
The two pleural membranes should be touching. If air creates a space between them the air will push the lung down and prevent it from filling with air. This is known as a collapsed lung, or pneumothorax. The air between the pleural membranes must be removed to reinflate the lung.
Fish breath (take in and exchange gasses) by passing water through their gill membranes which do the same job as our lung membranes.
mucous membranes, cilia
It occurs when antibodies are deposited in the membranes of both the lung and kidneys, causing both inflammation of kidney glomerulus (glomerulonephritis ) and lung bleeding
bronchioles
Each lung lies within the pleural cavity within which the lung expands. The pleural cavity is lined by two transparent elastic membranes called the pleura/pleural membranes. The inner pleuron covers the lung the outer pleuron is in contact with the walls of the thorax and the diaphragm. A thin layer of lubricating fluid between the pleural membranes allows them to glide over each other when the lungs expand and contract during breathing. So your answer is the pleural fluid lies between the pleural membranes.
The pleura: two thin membranes (visceral and parietal) separated by a fluid, that protect and cushion the lungs.
Lungs = Two membranes called pleurae (The outer layer of the pleurae is called the parietal pleura and the inner one is called the visceral pleura) Heart = The pericardium
The pleura: two thin membranes (visceral and parietal) separated by a fluid, that protect and cushion the lungs.
The visceral and anterior pleural membranes. If it scarped against the heart, then it may also pass through the visceral and anterior pericardial membrane.
The brain only have 3 different membranes.