Knowing how to work the lungs with model eksperimen

Tools and materials:

•  Y-shaped pipe
• Small and large rubber balloon 
• Rubber bracelet
• The size of a perforated cork bottle cap
• Plastic bottles of mineral water
• Plastic cutting tools (scissors or cutter)

Ways of working:
 
1. Prepare an experimental apparatus as shown in the following way

•   Attach a small balloon at the tip of each branch pipe. Reinforced with rubber bands.
• Cut the plastic bottle on the bottom.
• Replace lid plastic bottle with a cork perforated lid.
• Insert the tip of the cork perforated pipe branched from the bottom of the bottle.
• Cut the bottom of a large balloon with the scissors.
• Cover the bottom of the bottle with a balloon that has been cut, tie with a rubber band.
• Tie the end of the big balloon with a rubber band.

2. Hold the bottle by hand. Pull down the tip of a big balloon. What happens to the small balloon inside the bottle?
 
3. Remove the pull on the end of a big balloon. What happens to a small balloon inside the bottle?
 
4. Make your conclusions about this activity!

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