title: Voluntary factors influencing the distribution of inspired gas.
mesh_terms: D000009:Abdominal Muscles / Q000502:physiology*; D000328:Adult; D005260:Female; D005740:Gases; D006371:Helium; D006801:Humans; D008297:Male; D008875:Middle Aged; D009132:Muscles / Q000502:physiology; D011187:Posture; D012119:Respiration; D013909:Thorax / Q000502:physiology*; D014980:Xenon Radioisotopes
chemical_list: D005740:Gases; D014980:Xenon Radioisotopes; D006371:Helium