The Lungs are part of the respiratory system. To breathe you need more than just your lungs, there are several different organs and tissues working together every day.
The first thing that we are going to do is cut the bottom off your plastic bottle. You might need an adult to help you with this part. This is going to represent your chest
We are then going to get one of the balloons and tie a knot. We are then going to cut the end off the balloon and stretch it over the bottom of the plastic bottle and tape this in place so that no air can escape. This is going to represent your diaphragm.
We are now going to get your second balloon and tape this to your straw. Make sure that you tape it securely so that no air can escape. We are now going to push the balloon into the plastic bottle and seal the top around the straw using some sticky tac. The balloon will represent one of your lungs and the straw will represent your windpipe.
Now if you pull on the balloon on the bottom of the bottle you should see that the balloon expands and when you let go it deflates. This is a similar process to what happens when you breathe.
What is happening is that as you pull the balloon at the bottom, it creates more space in the bottle, so air enters through the straw and the balloon inflates to fill the space. As you let go the amount of space for air decreases and so air is pushed out through the straw and the balloon deflates.
When we breathe in, our diaphragm moves down, creating more space in our chest. This allows air to move through our nose and mouth, into our windpipe and then into the lungs as they inflate. In the lungs, oxygen enters the body and carbon dioxide leaves. Then when we breathe out the diaphragm moves up, reducing the space in the chest, forcing the air out of the body, and deflating our lungs
The video tutorial for this activity is available on the Surrey Libraries Facebook Page or the Surrey Libraries YouTube Channel
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