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Guide Questions
1. What happens to the smaller balloons inside as you pull and push the balloon at the bottom?

2. In the lung model, how does the air move in and out of the smaller balloons?

3. What is the expansion and contraction of the smaller balloons called? Specify your answer.

4. The materials used in the lung model represent organs of the respiratory system. Name them. 1-liter or bigger soft drink plastic bottle represents the b. 2 plastic juice straw represent the c. 2 small balloons represents the d. 1 larger balloon represent the

5. Is the function of the respiratory system important? Why?​