title: Ventilation function of the lungs during hypercapnia in old age.
mesh_terms: D000136:Acid-Base Equilibrium; D000293:Adolescent; D000328:Adult; D000368:Aged; D000375:Aging; D006801:Humans; D006935:Hypercapnia / Q000503:physiopathology*; D008875:Middle Aged; D010313:Partial Pressure; D011659:Pulmonary Gas Exchange; D012119:Respiration; D012129:Respiratory Function Tests