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what does each parts of the constructed lung model represent ?

the trachea, bronchi, lungs, diaphragm...
The end of the straw outside is the nostrils, the two straws inside is the bronchi. The big balloon is the diaphragm, the two balloons inside is the lungs. And the whole bottle is the respiratory system.


2-liter plastic bottle = chest cavity Two straws = bronchi Two balloons = lungs Larger balloon = diaphragm 
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