Lung surfactants are naturally occurring compounds or lipoproteins containing lipids and apoproteins that reduce the surface tension within the alveoli, allowing expansion of the alveoli for gas exchange.
Pneumothorax is one of the disorders of the chest and lower respiratory tract. It occurs when the parietal or visceral pleura is breached and the pleural space is exposed to positive atmospheric pressure.
Acute respiratory distress syndrome (ARDS) is a life-threatening lung condition. It is a form of breathing failure that can occur in very ill or severely injured people.