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:
- Trachea or windpipe