Once we explored the heart and the circulatory system, we focused on the lungs and the respiratory system; the group of organs and body tissues associated with breathing. We took part in different types of exercise to see the effect this would have on our breathing.

Next we used half a plastic bottle and balloons to make a model of the lungs. Have a look at the photos below.

The balloon at the bottom works like your diaphragm—a strong muscle that expands and contracts to cause your lungs to fill with air and then empty out again. The movement of the balloon matches your breathing – when you breathe in, your lungs fill with air just like the balloon inside the bottle did. That’s because the diaphragm expanded making room for air inside the lung. When you breathe out, your diaphragm contracts (or squeezes in) pushing all the air out of your lungs. 🎈🫁😮‍💨