Respiratory system.
All our muscles and organs need oxygen to function.
We breathe in Oxygen.
We breathe out carbon dioxide.
Oxygen enters our blood when we breathe in.
Carbon dioxide leaves our body when we breathe out.
The respiratory system is made up of:
NostrilsWindpipe
Bronchi
Lungs
Diaphragm
The air enters the nostrils
The nostrils have lots of little hairs to stop any object (like dust and insects).
When an object gets in, we sneeze it out.
The air passes through the
windpipe (or trachea).
The trachea is divided in two tubes called bronchi.
In the lungs there are alveoli.
Oxygen passes into the blood.
Carbon dioxide passes into the air.
Alveoli are little sacks sorrounded by blood capillaries.
When we breathe in
Our diaphragm goes down
When we breathe out
Our diaphragm goes up
And in a secret laboratory in mystery town…
A very clever scientist investigates the respiratory system…
To be continued…
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