Alveolar gas composition at 21,000 to 25,700 ft. (6400-7830 m).
D000531:Altitude; D002245:Carbon Dioxide; D019069:Cell Respiration; D006801:Humans; D009051:Mountaineering; D010100:Oxygen; D012119:Respiration
D002245:Carbon Dioxide; D010100:Oxygen
ALTITUDE; CARBON DIOXIDE; MOUNTAINEERING; OXYGEN; RESPIRATION