BALLOON LUNG
100

You breathe about this many times every single day without thinking about it

20,000 times

200

This muscle below your lungs does all the work of breathing

The diaphragm

300

When the diaphragm pulls down air does this

Rushes into your lungs

400

In our model the bottom balloon represented this body part that controls breathing

The diaphragm

500

Hospital machines that breathe for sick patients use this same idea as our balloon model

Ventilators