 |
 |
 |
 |
 |
 |
 |
|
|
 |
 |
 |
 |
 |
 |
 |
 |
Preparations
The process of human respiration (by which oxygen is inhaled and dioxide is exhaled) is examined.
Participants exhale into a plastic (polyethylene) bag several times, and the change in composition of the air inside the bag is observed/measured.
Participants exhale into a plastic (polyethylene) bag several times, and the change in composition of the air inside the bag is observed/measured.
You will need:
- One polyethylene bag (2 to 4 litre capacity)
- One rubber band
- Adhesive tape
- Scissors
-
Gas detection equipment, comprising:
- Gas sampling pump
- Carbon dioxide detector tube 2EL
- Carbon dioxide detector tube 2EH
- Oxygen detector tube 31E
 |
 |