Madhav Manek 4V 11th September 2003
Experiment to measure vital capacity
of lungs
Aim: To evaluate three techniques for measuring vital capacity.
Hypothesis: People, who are taller, play a lot of sport and/or play a musical instrument, which involves using your mouth, have larger lungs.
Apparatus: -Flow Spirometer
-Mouthpiece
-5 litre water bottle
-Rubber tube
-Beaker of Sterilizer
-Spirometer
-Milton Solution
Method: 1. For the flow spirometer is used to measure exhalation of air. You must reset the dial to zero and use a fresh mouthpiece before each use. After you have used it then put it into the Milton solution.
2. The second method is the displacement of water. You fill a 5 litre bottle with water. Hold it above a trough of water. Breathe out into it through a rubber tube as fully as you can, letting all the air out. Measure the volume. Rinse the mouthpiece in the Milton solution ready for the next person.