title: FACTORS AFFECTING REGIONAL DISTRIBUTION OF VENTILATION AND PERFUSION IN THE LUNG.
mesh_terms: D006801:Humans; D008168:Lung; D010100:Oxygen; D005082:Physical Exertion; D010827:Physiology; D011187:Posture; D011868:Radioisotopes; D012119:Respiration; D013147:Spirometry; D013575:Syncope; D014978:Xenon
chemical_list: D011868:Radioisotopes; D014978:Xenon; D010100:Oxygen
keywords: EXERTION; LUNG; OXYGEN; PHYSIOLOGY; POSTURE; RADIOISOTOPES; RESPIRATION; SPIROMETRY; SYNCOPE; XENON