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Respiratory System

Dr. Matt and Dr. Mike's Medical Podcast

78.6% of All the Gas in Our Atmosphere Is Nitrogen

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78.6% of all the gas in our atmosphere is nitrogen, right? So that means 78.6 per cent of that 760 millimeters of mercury. Percentage how much? What do you reckon? It's well in the 70s. The rest are trace gases. Don't worry about them. We've got this 78.6 for nitrogen, 20.9 for oxygen, 0.04% of carbon dioxide. I'm going to breathe in. Correct, though. What is it doing? I'll tell you in a sec. Let's just say nitrogen, 78.6%. Not much at all.

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