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What should you know about breathing?

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You usually don't even notice it, but 12 to 20 times per minute, day after day, you breathe -- thanks to your body's respiratory system. Your lungs expand and contract, supplying life-sustaining oxygen to your body and removing from it a waste product called carbon dioxide.

SOURCES:

TeensHealth: "Lungs and Respiratory System."

American Lung Association: "Learn About Your Respiratory System."

American Medical Association: "Respiratory System: Basic Function."

Reviewed by William Blahd on July 14, 2017

SOURCES:

TeensHealth: "Lungs and Respiratory System."

American Lung Association: "Learn About Your Respiratory System."

American Medical Association: "Respiratory System: Basic Function."

Reviewed by William Blahd on July 14, 2017

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What happens to your lungs and respiratory system when you breathe?

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THIS TOOL DOES NOT PROVIDE MEDICAL ADVICE. It is intended for general informational purposes only and does not address individual circumstances. It is not a substitute for professional medical advice, diagnosis or treatment and should not be relied on to make decisions about your health. Never ignore professional medical advice in seeking treatment because of something you have read on the WebMD Site. If you think you may have a medical emergency, immediately call your doctor or dial 911.

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