title: [Composition of the blood gases in the aged--studies on the normal value and postural changes].
mesh_terms: D000293:Adolescent; D000328:Adult; D000368:Aged; D000375:Aging; D002245:Carbon Dioxide / Q000097:blood*; D005260:Female; D006801:Humans; D006863:Hydrogen-Ion Concentration; D008297:Male; D008875:Middle Aged; D009765:Obesity / Q000097:blood; D010100:Oxygen / Q000097:blood*; D011187:Posture
chemical_list: D002245:Carbon Dioxide; D010100:Oxygen