MEDICAL PHYSIOLOGY

Detailed explanation-1: -There is 450 ml of blood in the lungs (9% of the total blood volume), of which 70 ml is found in capillaries. The lungs can serve as a reservoir of blood, there can be half or twice the amount of blood. If the left heart fails, blood accumulates in the pulmonary circulation.

Detailed explanation-2: -The bronchial artery is the main source of blood supply for the bronchi. The bronchial arteries provide the normal systemic arterial supply to the lungs after birth and generally comprise one to three small arteries from the upper dorsal aorta or right intercostal artery supplying each lung (, 6), (, 10).