2. Diagram of the Output
Chest Cavity tightens
Diaphragm
relaxes
Lungs expel air
Bronchi
Diaphragm
tightens
Lungs inhale air
Chest Cavity rises
Bronchi
3. Guide Questions and Answers
What part of the lungs does your model represents?
-Each part of the model represents a certain part of the
respiratory system. The 2 tubes or straws represent the
bronchi, the small balloons represent the lungs, the
bottle represents the chest cavity and the big balloon,
or the cellophane represents the diaphragm.
What happens when you pull down the balloon?
-The balloon inflates.
What happens when you pull down the balloon?
-The balloon deflates.
4. How does the movement of the diaphragm cause the air to
go in and out of the lungs?
- When the diaphragm is pulled down/contracts, air will
rush into the lungs. When the diaphragm is pulled
up/relaxes air will be pushed out of the lungs.
What will happen if you prick the balloon?
- Air cannot rush to the balloon(lungs) because it has a hole.
Breathing will not be possible because pressure is not
contained inside the lungs.
5. Conclusion
When the diaphragm contracts, air will rush into
the lungs. When the diaphragm is relaxes air will be
expelled out of the lungs. When the pressure outside is
higher, air is forced into our lungs. When the lungs
gain pressure from the air entering from the outside,
air will be expelled out.
