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to breathe in oxygen and other gases


to breathe out carbon dioxide and other gases


what every cell in the body needs in order to live and function


controls how you breathe

involuntary breathing

automatic breathing

voluntary breathing

breathing that you think about and control for a short time


the strong curved muscle attached below the lungs to the lower ribs and backbone

chest muscles and diaphragm

change the space and pressure inside your body to allow you to breathe

the respiratory system

our breathing system

cells use


cells produce

carbon dioxide

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