title: Gas exchange in chronic air-flow obstruction.
mesh_terms: D001991:Bronchitis / Q000503:physiopathology; D002302:Cardiac Output; D005080:Exercise Test; D006801:Humans; D008173:Lung Diseases, Obstructive / Q000503:physiopathology*; D010100:Oxygen / Q000097:blood; D005082:Physical Exertion; D011656:Pulmonary Emphysema / Q000503:physiopathology; D011659:Pulmonary Gas Exchange; D012129:Respiratory Function Tests
chemical_list: D010100:Oxygen