- The Heart—Lung Relationship The heart and lungs work together to maintain our blood supply.
- As blood circulates through our body, its oxygen is consumed and replaced with (arhon dioxide.
- The right ventricle of the heart sends the deoxygenated blood to the lungs is the pulmonary arteries.
- These arteries closely follow the bronchial tree and terminate at the capillaries of the tiny air sacs (alveoli), where the carbon dioxide is removed and replaced once more with oxygen.
- The reoxygenated blood is returned to the left chamber (atrium) of the heart for circulation around the body again.