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Speaker 1: Welcome to brain Stuff from how Stuff Works dot com

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Speaker 1: where smart happens. This podcast is brought to you by

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Speaker 1: it go to meeting dot com slash brain Stuff. Hi,

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Speaker 1: I'm Marshall brain with today's question, how much oxygen does

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Speaker 1: a person consume in a day? The average adult at

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Speaker 1: rest inhales and exhales something like seven or eight liters

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Speaker 1: of air per minute. Think about a two liter soda bottle.

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Speaker 1: Every minute you're inhaling and exhaling about four of those.

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Speaker 1: That totals something like eleven thousand liters of error in

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Speaker 1: a day. The air that is inhaled is about oxygen,

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Speaker 1: and the air that's exhaled is about fift oxygen, So

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Speaker 1: about five of the volume of air is consumed in

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Speaker 1: each breath and convert of the carbon dioxide. Therefore, a

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Speaker 1: human being uses about five fifty liters of pure oxygen

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Speaker 1: or nineteen or so cubic feet of pure oxygen per day.

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Speaker 1: A person who's exercising obviously uses a lot more oxygen

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Speaker 1: than that. You can determine how much air is moving

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Speaker 1: through your lungs by exhaling into a plastic bag of

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Speaker 1: known volume at each breath and seeing how long it

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Speaker 1: takes to fill the bag. Do you have any ideas

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Speaker 1: or suggestions for this podcast? If so, please send me

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Speaker 1: an email at podcast at how stuff works dot com.

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Speaker 1: For more on this and thousands of other topics, go

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