This unit simulate the function of the respiratory system. 
Pull down the rubber skirt to create a partial vacuum within the bell jar, air rushed in the balloons, inflating them like a set of Lungs.
Consists of transparent plastic bell jar . 
Y tube mounted with balloons to illustrate Lungs. 
Silicon rubber sheet to illustrate the Diaphragm. 
Overall size: 200x250mm

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Lungs Model

SKU: SL-694