Regional differences in the lung.
D006801:Humans; D008168:Lung / Q000033:anatomy & histology*; D008171:Lung Diseases / Q000209:etiology*; D008954:Models, Biological; D010994:Pleura; D011312:Pressure; D011650:Pulmonary Alveoli / Q000033:anatomy & histology; D011652:Pulmonary Circulation; D011656:Pulmonary Emphysema / Q000209:etiology; D012119:Respiration; D013314:Stress, Mechanical; D014692:Ventilation-Perfusion Ratio