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- Respiratory System (a True Book: Your Amazing Body)
Respiratory System (a True Book: Your Amazing Body)
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Our respiratory system is responsible for cleaning the air that we breathe, supplying our bodies with oxygen, and getting rid of carbon dioxide. Did you know that you breathe in and out about 22, 000 times a day? Or that your left lung is slightly smaller than your right? That leaves room in your chest for your heart! Learn all this and more in Respiratory System"--
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