Blood supply
The lungs have a dual blood supply. The pulmonary artery supplies deoxygenated blood to the alveolar capillaries where gas exchange occurs. The pulmonary vein, carrying oxygenated blood, drains the pulmonary capillaries. Bronchial arteries and veins, lying in the walls of respiratory passageways, supply oxygenated blood to and drain wastes away from the passageways.
Pulmonary artery
The lungs have a dual blood supply. The pulmonary artery supplies deoxygenated blood to the alveolar capillaries where gas exchange occurs. The pulmonary vein, carrying oxygenated blood, drains the pulmonary capillaries. Bronchial arteries and veins, lying in the walls of respiratory passageways, supply oxygenated blood to and drain wastes away from the passageways.
Pulmonary capillaries
The lungs have a dual blood supply. The pulmonary artery supplies deoxygenated blood to the alveolar capillaries where gas exchange occurs. The pulmonary vein, carrying oxygenated blood, drains the pulmonary capillaries. Bronchial arteries and veins, lying in the walls of respiratory passageways, supply oxygenated blood to and drain wastes away from the passageways.
Pulmonary veins
The lungs have a dual blood supply. The pulmonary artery supplies deoxygenated blood to the alveolar capillaries where gas exchange occurs. The pulmonary vein, carrying oxygenated blood, drains the pulmonary capillaries. Bronchial arteries and veins, lying in the walls of respiratory passageways, supply oxygenated blood to and drain wastes away from the passageways.
Bronchiolar vessels
The lungs have a dual blood supply. The pulmonary artery supplies deoxygenated blood to the alveolar capillaries where gas exchange occurs. The pulmonary vein, carrying oxygenated blood, drains the pulmonary capillaries. Bronchial arteries and veins, lying in the walls of respiratory passageways, supply oxygenated blood to and drain wastes away from the passageways.