Experiment to measure vital capacity of lungs.

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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.

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          3. The third and final method is the Spirometer. Empty the spirometer of air by pressing down gently on the lid. Attach the larger rubber mouthpiece into the larger rubber tube. Exhale just like the previous method. Your partner should kneel down to eye level so that he can read off the scale clearly as you breathe out.

Diagrams:

        

Results:

Analysis: In the results in noticed that people who played sports or played a musical instrument, ...

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