How much oxygen is breathed into a human lung in one breath?

Answer 1

we need about 20 percent a day

4%
4%
Although Earth's atmosphere at sea level contains 21% oxygen by volume the human body only uses about 5% out of the available 21% oxygen per breath. Oxygen is used to facilitate the conversion of glucose into energy (ADP - adenosine triphosphate) by acting as a proton trasnfer agent in the electron transfer chain after the Kerbs Cycle. It is because we only require about 5% out of the available 21% that we can save other peoples' lives via artificial respiration during CPR; ie: we have 16% that we breath out so the other person has more than they need.

Answer 2

Normal air contains approximately 20% O2 and 0.5% CO2. When a human inhales, we absorb and use some of the oxygen we breathe in. Our metabolism converts that Oxygen to Carbon Dioxide, which we exhale, or outgas. However, the process isn't perfect: we don't use all the oxygen we inhale, nor to we exhale all the carbon dioxide in our system. So, when we exhale, the exhaled breath contains either 14% or 16% oxygen, down from the 20% the air contains. This is, by the way, why CPR and rescue breathing work. While your exhalent does not contain the full 20% O2 we see in free air, it contains enough oxygen for a person to survive on.

The actual quantity depends on the size of the person.

Answer 3

Depends on the person and their age, fitness level and whether they are at rest or active. Wikipedia suggests the following:

* Newborns: Average 44 breaths per minute * Infants: 20-40 breaths per minute * Preschool children: 20-30 breaths per minute * Older children: 16-25 breaths per minute * Adults: 12-20 breaths per minute * Adults during strenuous exercise 35-45 breaths per minute * Athletes' peak 60-70 breaths per minute However a person in meditation may go down to 4 breaths a minute and a smker running for his life may be panting very quickly.

Answer 4

In an average gasp of air, only 15-20% is oxygen. When you exhale you release around 10%. In short, 10% would be the ideal minimum.

Answer 5

if oxegyen was water then about 5 gallons of water you breath in each breath

Answer 6

On average, a person breathes in about 0.5 liters of air in one breath. This air consists of roughly 21% oxygen, so approximately 0.105 liters of oxygen is inhaled with each breath.

Answer 7

15000mL of air per hour

Answer 8

About 15 gallons

Answer 9

20%