7th February 2024

Blood supply to the lung

The lung receives blood supply via bronchial circulation and pulmonary circulation.

Bronchial circulation carries oxygenated blood from the left ventricle and supplies part of the tracheobronchial tree. Bronchial arteries arise from the aorta and the intercostal arteries and drain into pulmonary veins.

Pulmonary circulation carries mixed venous blood from the right ventricle to the pulmonary capillaries, where it participates in gas exchange.