Answers

2015-06-16T23:19:06+08:00
The balloon represents the diaphragm. when you pull it down, air goes in the two balloons inside the container.
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2015-06-16T23:19:50+08:00
As you pull down the balloon at the bottom of the model. The two small balloons inflate. That means when we inhale diaphragm contracts and the lungs willhave a greater volume and the pressure will be lessure.
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