Take one of the balloons and cut off the bottom part leaving you with only the top part that may resemble a very small swim cap.
Rubber sheeting lung functio.
Rubber sheet at the bottom.
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The lung model shows inhalation.
This increase in volume causes a decrease in pressure.
H weight 1 5 lb.
For example during a lifetime a coal miner may inhale 1 000 g of dust into his lungs.
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When using the lung function model what part of the respiratory system is represented by.
Our simple approach has endured.
Using the thumbtack or nail poke a hole in the bottom.
Strong rubber sheet is used to perform the function of the diaphragm as the diaphragm is pulled down the atmospheric pressure is lowered in the plastic chamber which inflates the lungs balloons when diaphragm is released the lungs deflate approximate size 8 dia.
When the diaphragm rubber sheet moves down the volume inside the glass jar thorax increases.
Repeat with the tube closed.
As the rubber sheeting returns to its original position the lungs deflate.
Luckily the lungs have another function they have defense mechanisms that protects them by removing dust particles from the respiratory system.
When doctors examine the lungs of a miner after death they find no more than 40 g of dust.
Includes shatter resistant plastic bell jar 8 x 8 with rubber diaphragm and balloon lungs we use cookies to provide you with a great user experience.
The hole doesn t need to be too large about 2 3 mm.
As the rubber sheeting is pulled down the lungs inflate.