Bronchial aery supplies lungs up to:
Bronchial aeries carry oxygen to tracheobronchial tree and lung parenchyma and supplies till the level of respiratory bronchiole. Pulmonary aeries alone vascularize the fuher distal pathways, including alveolar ducts and the alveoli.
Teiary bronchioles
Respiratory bronchiole
Alveolar ducts
Terminal bronchiole
Bronchopulmonary Segments, Embryonic veins