Pulmonary markings Including pulmonary artery,vein,lymphatics,mainly artery: ■ Distribution:Radiating from the hilum,branches lower part is rougher than upper part ◼ Including pulmonary artery, vein, lymphatics, mainly artery; ◼ Distribution: Radiating from the hilum, branches； ◼ lower part is rougher than upper part. Pulmonary markings