Making a lung

In the science class we talked about how humans breathe and to see how the lungs  work we made one in a bottle.
If you want to make one at home you only need:
A plastic bottle
two baloons
an elastic band
play doh
Instructions
The straw is the tráquea,  the green baloon is the lung, the purple balloon is the  diaphragm and the bottle is the thorax.
Let us know if you try making one!