1) What do you need to make model lungs? 2) What happens when you pull the bottom balloon? 3) Why does the balloon inside get bigger? 4) Which body part moves when we breathe? 5) Why do we need to breathe? 6) What gas do we breathe in? 7) What gah do we breathe out? 8) Can you explain how the model lungs work?

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Kas taastada automaatselt salvestatud ?