title: Sites and mechanisms of airway obstruction in COPD.
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000368:Aged; D000402:Airway Obstruction / Q000209:etiology*; D000403:Airway Resistance; D001980:Bronchi / Q000033:anatomy & histology; D002648:Child; D002675:Child, Preschool; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D007249:Inflammation / Q000150:complications; D008168:Lung / Q000254:growth & development / Q000502:physiology / Q000503:physiopathology; D008170:Lung Compliance; D008173:Lung Diseases, Obstructive / Q000150:complications* / Q000503:physiopathology; D008875:Middle Aged; D009093:Mucus / Q000378:metabolism; D011650:Pulmonary Alveoli / Q000254:growth & development; D012119:Respiration; D014797:Vital Capacity