Glass tube ---> Trachea
Ballons ---> Lung
Bell jar ---> Thoracic Cavity
Rubber sheet ---> Diaphragma
Y-tube ---> Bronchus
- When the rubber sheet is pulled down, the pressure inside the bell jar decreases. Air from outside enter the balloons
- When the rubber sheet is pushed up, the pressure inside the bell jar increases. Air is forced out of the balloons
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