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The lungs act a bit like baloons. When you breathe in they will inflate, when you breathe out they will deflate. Using a balloon may be useful way to understand this, breathe into the balloon and it will inflate (this is what happens when you breathe in). Next, leave the air out (slowly) and this is what happens your lungs when you breathe out.

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12y ago
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15y ago

the lungs are like 2 bags of air and if you squeeze those bags then the air will be pushed out and when you let go of the bags then more air will go in so that is a demonstration of the lungs.

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Q: What are the lungs like?
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