Answers

2016-06-25T13:04:20+08:00
The big stem represent the TRACHEA.the two branch of connecting stem represent the BRONCHI.the small stem represent the BRONCHIOLES.the fruit represent the ALVEOLI.
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2016-06-25T14:07:08+08:00
The straw outside the model :trachea 
the straw inside the model:bronchi
the bottle:chest cavity/rib cage 
the two small balloons:lungs
the bottom at the model is the :diaphragm
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