Reduced Lung Capacity Back Pain

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The lungs have two primary functions: to acquire oxygen from the air, which is required for life, and to remove carbon dioxide from the body. Carbon dioxide is a byproduct of many of the chemical reactions that sustain life.

During breathing, air enters and exits the lungs. It flows in through increasingly smaller airways, finally filling tiny sacs called alveoli. Blood circulates around the alveoli through capillaries (tiny blood vessels). Where the capillaries...

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