Page 48 - MC First Aid at Work Course Manual v2.0
P. 48
MODULE 8
First Aid at Work : UNIT 1
01.04.2018
THE RESPIRATORY SYSTEM
The air we breathe in roughly consists of:
Nitrogen 78% Oxygen 21% Argon and other gases 1%
From the oxygen we breathe in, we use approximately 25% of it, as our system can only accommodate so much. The rest is dispelled with when we breathe out, along with other gases including carbon dioxide.
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