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Investigating Breathing in and out

Put each hand on the side of your chest. Then take a deep breath in. Breathe out. Repeat. Note what happens to your chest.

This is what you will observe: The volume of your chest increases as you breathe in and decreases as you breathe out waste gas.

Another experiment: Take a deep breath. Try to hold your breath and estimate how many seconds you can stay without exhaling.

This is what you will observe: One cannot stay very long without breathing. Breathing is important to the body.

Parts of the human breathing system

The following organs are parts of the human breathing system:

  • Nose
  • Trachea or windpipe
  • Bronchus
  • Lungs
  • Diaphragm
January 31, 2020

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