Obviously, we breathe in oxygen from the air into our lungs and transport and exchange it through our blood transport system. The heart pumps oxygenated blood to capillaries in our tissue, then pumps deoxygenated blood back to the lungs, exchanges it again and we exhale the used carbon dioxide from our lungs. That exchange of oxygen and carbon dioxide must be precise to sustain the balance of life. The balance is called the ventilation (lungs) to perfusion (circulation) ratio. Lung function has a seemingly simple task: to oxygenate cells efficiently. Read More
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