With this experiment, my students have discovered how can humans breathe: we can't control our lungs, but we can control our diaphragm (because it's a muscle!!).

  1. When we breathe in, our diaphragm moves down, so our lungs fill with air.

  2. When we breathe out, our diaphragm moves up, so our lungs exhaled air.

Let's see one of my students (Mario) explaining how the respiratory system works. He has done a pretty good job. Congratulations, Mario!!

The experiment we made is very simple. Check how to do it with this video:

My students worked hard doing this experiment. Check it out with the following picture book:

Finally, let's see the results. What do you think? I think they did a pretty good job!!