breathing rate - The number of times we breathe in & breathe out in one minute., breathing - the way we take air into our lungs & let it out again., Diaphragm - a muscle in the chest that helps us to breathe in & out., Lungs - the organs that we use for breathing, windpipe - the air tube that carries air from the nose & mouth to the lungs & back again., oxygen - Our bodies need a gas in the air, carbon dioxide - Our bodies produce a waste gas that we must get rid of , Chest - Lungs are found here, Ribs - Lungs are protected by the, 15- 20 times - Each minute we breathe in, To take in air that contains oxygen which the body needs. - We need to breathe because, Yes, We need oxygen all the time, even when we are asleep. - Do, we breathe all the time? Why?,

Respiratory System

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