Peripheral airway obstruction and particulate deposition in the lung.
D000336:Aerosols; D000402:Airway Obstruction / Q000503:physiopathology*; D000818:Animals; D004058:Diffusion; D004195:Disease Models, Animal; D004285:Dogs; D005459:Fluorides / Q000494:pharmacology; D006371:Helium / Q000494:pharmacology; D008168:Lung / Q000187:drug effects / Q000503:physiopathology*; D008954:Models, Biological; D011650:Pulmonary Alveoli / Q000187:drug effects; D012119:Respiration; D014692:Ventilation-Perfusion Ratio; D014797:Vital Capacity
D000336:Aerosols; D006371:Helium; D005459:Fluorides