Doctors use stethoscopes to listen to their patients' heart
beats. You can make a stethoscope and listen to your own heart
What you need:
- 30 cm of plastic tubing, such as garden hose
- Two plastic funnels
- Push one of the funnels into one end of the plastic tubing.
Secure with sellotape.
- Repeat step 1 with the second funnel on the other end of the
- Place one of the funnels over your heart and the other funnel
over your ear.
Can you hear your heart beat? Try running around for 30 seconds
and listen to your heart beat again. Is your heart beat faster or
Doctors use stethoscopes to measure your heart rate.
Stethoscopes act as a sound amplifier, carrying the sound of your
heart rate to the doctor's ears and making the sound louder.
When you run around your heart has to work harder to pump oxygen
around your body. This is why your heart rate speeds up.
Find out more about the heart on Planet
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