title: The number and dimensions of small airways in nonemphysematous lungs.
mesh_terms: D000328:Adult; D000368:Aged; D000403:Airway Resistance; D001980:Bronchi / Q000033:anatomy & histology*; D005260:Female; D006801:Humans; D008168:Lung / Q000033:anatomy & histology*; D008297:Male; D008875:Middle Aged; D012123:Pulmonary Ventilation; D013194:Staining and Labeling