The Amazing Workings of a Human Heart and Lungs

Grade 9 Biology Project 3 - The Amazing Workings of a Human Heart and Lungs

Purpose:

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.

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Hypothesis:

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.

Variables:

Heart beat at rest versus after exercise
Position of the diaphragm

Materials Needed:

For the stethoscope you will need:

Small funnel
Glass T-tube or Y-tube
Rubber tubing

For the diaphragm you will need:

Rubber tube
Clamp
Rubber band or string
Y-Tube
Bell jar
Rubber balloons
Sheet rubber
Rubber Stopper

Buy The Complete "How Pheromones Act As A Security System For Aphids" Project for Only $5.00:

Buy ALL 5 Grade 9 Biology Projects for only $7.00:

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