Lungs in a bottle

Students build a model of the lungs from a bottle and balloons and talk about the effects of smoke.

Steps

1. Cut the bottom off a bottle and fit a balloon inside over the neck.
2. Stretch a cut balloon over the bottom as a diaphragm.
3. Pull the diaphragm and watch the model breathe in.
4. Talk about what smoke does to the lungs and airways.

Tip: Watch out for the sharp edges of the bottle; cover them with tape.

Materials needed

• Balloons (1 pack)
• Electrical tape (1 roll)