Grade 9 Biology Project 3 - The Amazing Workings of a Human Heart and Lungs
The purpose of this science fair project is to explain how the human heart and lungs function. The function of these vital organs will be demonstrated by building a stethoscope to listen to a heart beat. The heart rate of individuals will be monitored while they are at rest and after exercising vigorously.
In addition, a diaphragm will also be constructed to show how the human lungs work. The virtual diaphragm will demonstrate how it affects chest pressure.
The heart rate of the test subjects (other students) will be higher after vigorous exercise. The position of the diaphragm affects the pressure in the chest.
- Heart beat at rest versus after exercise
- Position of the diaphragm
For the stethoscope you will need:
- Small funnel
- Glass T-tube or Y-tube
- Rubber tubing
For the diaphragm you will need:
- Rubber tube
- Rubber band or string
- Bell jar
- Rubber balloons
- Sheet rubber
- Rubber Stopper
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