Gas mixing and distribution in the lung.
D005740:Gases; D006321:Heart / Q000502:physiology; D006801:Humans; D008168:Lung / Q000502:physiology*; D008954:Models, Biological; D009584:Nitrogen; D012123:Pulmonary Ventilation; D012119:Respiration; D012126:Respiratory Dead Space; D014980:Xenon Radioisotopes
D005740:Gases; D014980:Xenon Radioisotopes; D009584:Nitrogen