## respiration of human body

Human Anatomy, Physiology, and Medicine. Anything human!

angel92
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### respiration of human body

The air that is inhaled is about 20-percent oxygen, and the air that is exhaled is about 15-percent oxygen, so about 5-percent of the volume of air is consumed in each breath and converted to carbon dioxide. Therefore, a human being uses about 550 liters of pure oxygen (19 cubic feet) per day.

The average person takes about 28,800 breaths a day

How much oxygen does one breath contain that is used by the human body.

BasicBiology
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The volume of air that is inhaled varies between person and with the depth of each breath. Obviously some breaths inhale more air than others and inhalation can range between ~400ml to ~5L. The efficiency of respiration also reduces with age and is reduced in smokers.

Anyway, to give you an answer: if we worked with an average resting breath of around 350ml of air that reaches the lungs, and 20% of that is oxygen we have around 70ml of oxygen in each breath. 5% of that is used, so approximately 3.5ml of oxygen would be used per breath.

On average a human body produces around 1kg of CO2 a day.
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Kerenaae
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### Re: respiration of human body

The average adult at rest inhales and exhales something like 7 or 8 liters (about one-fourth of a cubic foot) of air per minute. That totals something like 11,000 liters of air (388 cubic feet) in a day.

Serwab
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### Re: respiration of human body

Kerenaae wrote:
Thu Jan 08, 2015 1:36 pm
The average adult at rest inhales and exhales something like 7 or 8 liters (about one-fourth of a cubic foot) of air per minute. That totals something like 11,000 liters of air (388 cubic feet) in a day.
Kerenaae wrote:
Thu Jan 08, 2015 1:36 pm
The average adult at rest inhales and exhales something like 7 or 8 liters (about one-fourth of a cubic foot) of air per minute. That totals something like 11,000 liters of air (388 cubic feet) in a day.
angel92 wrote:
Wed Nov 12, 2014 2:52 pm
The air that is inhaled is about 20-percent oxygen, and the air that is exhaled is about 15-percent oxygen, so about 5-percent of the volume of air is consumed in each breath and converted to carbon dioxide. Therefore, a human being uses about 550 liters of pure oxygen (19 cubic feet) per day.

The average person takes about 28,800 breaths a day

How much oxygen does one breath contain that is used by the human body.

Serwab
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Posts: 3
Joined: Mon May 21, 2018 10:33 am

### Re: respiration of human body

angel92 wrote:
Wed Nov 12, 2014 2:52 pm
The air that is inhaled is about 20-percent oxygen, and the air that is exhaled is about 15-percent oxygen, so about 5-percent of the volume of air is consumed in each breath and converted to carbon dioxide. Therefore, a human being uses about 550 liters of pure oxygen (19 cubic feet) per day.

The average person takes about 28,800 breaths a day

How much oxygen does one breath contain that is used by the human body.

Serwab
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Posts: 3
Joined: Mon May 21, 2018 10:33 am

### Re: respiration of human body

Serwab wrote:
Mon May 21, 2018 10:52 am
angel92 wrote:
Wed Nov 12, 2014 2:52 pm
The air that is inhaled is about 20-percent oxygen, and the air that is exhaled is about 15-percent oxygen, so about 5-percent of the volume of air is consumed in each breath and converted to carbon dioxide. Therefore, a human being uses about 550 liters of pure oxygen (19 cubic feet) per day.

The average person takes about 28,800 breaths a day

How much oxygen does one breath contain that is used by the human body.

stephannie
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### Re: respiration of human body

Kerenaae wrote:
Thu Jan 08, 2015 1:36 pm
The average adult at rest inhales and exhales something like 7 or 8 liters (about one-fourth of a cubic foot) of air per minute. That totals something like 11,000 liters of air (388 cubic feet) in a day.
Even though I love science and have a degree in it, I had absolutely no idea about this. It really blows my mind to know the fact in metrics

ajalex
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### Re: respiration of human body

We need oxygen to breath.

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