Muscularity of pulmonary artery branches in the upper and lower lobes of the normal young and aged lung.
D000328:Adult; D000368:Aged; D000375:Aging; D003094:Collagen; D004547:Elastic Tissue / Q000033:anatomy & histology; D005260:Female; D006801:Humans; D006818:Hyalin / Q000033:anatomy & histology; D008168:Lung / Q000098:blood supply*; D008297:Male; D009130:Muscle, Smooth / Q000033:anatomy & histology*; D011651:Pulmonary Artery / Q000033:anatomy & histology*; D012737:Sex Factors
D003094:Collagen