Pulmonary gas transfer.
D000531:Altitude; D000758:Anesthesia; D006801:Humans; D000860:Hypoxia / Q000209:etiology; D011655:Pulmonary Embolism / Q000150:complications / Q000503:physiopathology; D011659:Pulmonary Gas Exchange; D014692:Ventilation-Perfusion Ratio