069 BREATHING MECHANISM

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069 BREATHING MECHANISM
To study the principles of Inhalation and
exhalation
MATERIALS REQUIRED
Plastic bottle 2 small balloons Drinking
straw Little dough made from flour Rubber sheath
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Take a bottle, cut the base and attach the rubber
tightly to the base of the bottle. Insert the
straw with two small rubber balloons into the
bottle and seal the extra openings by
dough. When the rubber base is pulled outwards,
the balloon gets filled with air to show
inhalation. When the rubber base is pushed
inwards, the air is released to show exhalation
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