Exchange of gases in the body

We breathe in oxygen (O2)

Carbon dioxide (CO2) is eliminated when we breathe out

Oxygenated blood travels to the heart and the rest of the body

Oxygen (O2) moves from the alveoli into the blood capillaries

Carbon dioxide (CO2) moves from the capillaries into the alveoli

Cells produce energy and a waste gas called carbon dioxide (CO2)

Capillaries carry deoxygenated blood

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