They have a thin basement membrane and an endothelial layer. The space between capillaries and gas in alveoli is very little.
gas exchange occurs between pulmonary capillaries and the alveoli in the lungs.
pulmonary edema
pulmonary vein
Capillaries The smallest of the blood vessels: capillaries.
Pulmonary Capillaries
diffusion
through your pulmonary artery and pulmonary vein.
CO2 and O2
99%
pulmonary artery pumps the blood away from the heart into the capillaries
The systemic arteriole, then the capillaries, the venule, the vein, the vena cava, the heart, the pulmonary artery, the pulmonary arterioles, capillaries, the pulmonary veins, the heart, into the aorta, and back into the artery.
Pulmonary veins