The alveolar-arterial oxygen gradient in young and elderly men during air and oxygen breathing.
D000328:Adult; D000368:Aged; D000375:Aging; D001158:Arteries; D002245:Carbon Dioxide / Q000097:blood; D006801:Humans; D006863:Hydrogen-Ion Concentration; D008297:Male; D008875:Middle Aged; D010100:Oxygen / Q000097:blood; D010313:Partial Pressure; D011650:Pulmonary Alveoli / Q000502:physiology*; D012119:Respiration / Q000502:physiology*; D012129:Respiratory Function Tests
D002245:Carbon Dioxide; D010100:Oxygen