The respiratory system
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- it is the system that allows us to get
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from the air inhaled in the lungs and to expel
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through exhalation
- every time we inhale, air enters our nose or our mouth and, passing through the
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and the
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, it goes down the long
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tube and inside two small galleries, the
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- the bronchi lead into the
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and they divide again into several other galleries which become smaller and smaller
- they are called
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tubes and in turn they split into many very small tubes which connect to more than 700 tiny sacs of spongy tissue, the
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, whose walls are very thin
- it is here that the
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oxygen-carbon dioxide between
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and lungs takes place
- going through the lungs, the blood fills up with
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to be taken to the heart and it leaves the
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which is removed from the lungs upon
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- the respiratory system's primary organs include the
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, nose, pharynx,
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, trachea,
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, lungs
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