The capillaries carry the blood around the alveoli.
The pulmonary artery takes the blood to the alveoli.
air exchange takes place at the juction of blood cappileries and alveoli where the pressure of air is high in alveoli and low in blood so air from alveoli rush into blood and CO2 from blood rush in to alveoli which is then breath out
Arteries
Veins.
as it moves through blood vessels capillaries in the alveoli walls, your blood takes oxygen from the alveoli and gives off carbon dioxide to the alveoli
Aorta.
An artery takes blood away from the heart
Oxygen enters the blood in the alveoli of the lungs
Pulmonary Vein
aorta
The actual air exchange in the lungs takes place in the alveoli, which are tiny sacs at the end of the bronchioles. Oxygen from the inhaled air passes through the walls of the alveoli and into the bloodstream, while carbon dioxide moves from the blood into the alveoli to be exhaled.
The exchange of carbon dioxide and oxygen takes place in the lungs, specifically in the alveoli where oxygen is taken in by the blood and carbon dioxide is released from the blood to be exhaled out of the body through the respiratory system.