How Much Oxygen Do We Breath Out?

Answer

We breathe out about 14% of oxygen. We inhale about 20% oxygen from all the air that we breathe in. We breathe out what remains unused during respiration.
Q&A Related to "How Much Oxygen Do We Breath Out"
We breathe, simply, because we have to! Breathing is what keeps us alive. It is the process of taking in oxygen from the air and letting out nitrogen and CO2.
http://answers.ask.com/Health/Diseases/why_do_we_b...
About 21% of air is oxygen.
http://wiki.answers.com/Q/What_percent_of_the_air_...
1. Place the oxygen mask over your nose and mouth. Make sure it is a comfortable fit. 2. Place the elastic band around the back of your head. The elastic band should fit comfortably
http://www.ehow.com/how_6938540_breathe-oxygen-mas...
We breathe about 20% oxygen in the air. Thanks for using
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