title: Aging, cigarette smoking, and respiratory function.
mesh_terms: D000328:Adult; D000368:Aged; D000375:Aging; D000403:Airway Resistance; D003011:Closing Volume; D005260:Female; D005541:Forced Expiratory Volume; D006801:Humans; D008297:Male; D008448:Maximal Expiratory Flow Rate; D008875:Middle Aged; D010100:Oxygen; D010313:Partial Pressure; D012119:Respiration; D012907:Smoking / Q000503:physiopathology*
chemical_list: D010100:Oxygen