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What is the composition of inhaled oxygen in the atmosphere?

What is the composition of inhaled oxygen in the atmosphere?

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Answers (6)

4 days ago
Inhaled air is by volume 78.08% nitrogen, 20.95% oxygen and small amounts include argon, carbon dioxide, neon, helium, and hydrogen. The gas exhaled is 4% to 5% by volume of carbon dioxide, about a 100 fold increase over the inhaled amount.
4 days ago
The breathing of all vertebrates with lungs consists of repetitive cycles of inhalation and exhalation through a highly branched system of tubes or airways which lead from the nose to the alveoli.[3] The number of respiratory cycles per minute is the breathing or respiratory rate, and is one of the four primary vital signs of life.[4] Under normal conditions the breathing depth and rate is automatically, and unconsciously, controlled by several homeostatic mechanisms which keep the partial pressures of carbon dioxide and oxygen in the arterial blood constant. Keeping the partial pressure of carbon dioxide in the arterial blood unchanged under a wide variety of physiological circumstances, contributes significantly to tight control of the pH of the extracellular fluids (ECF). Over-breathing (hyperventilation) and under-breathing (hypoventilation), which decrease and increase the arterial partial pressure of carbon dioxide respectively, cause a rise in the pH of ECF in the first case, and a lowering of the pH in the second. Both cause distressing symptoms.
mhz vee
4 days ago
Inhaled air is a mixture of gases, with typically about 17% oxygen, as well as nitrogen, carbon dioxide, water vapor, trace amounts of Nobel Gases, and some gaseous pollutants and solid particles such as dust. However, in your lungs a gas exchange takes place by diffusion. Since the inhaled air has a higher concentration of oxygen, it diffuses into your blood, and since your blood has a higher concentration of carbon dioxide, it diffuses out of your blood and into the remaining air in your alveoli (lung sacs), which you then exhale.
4 days ago
Inhaled air has the same composition as normal air, it contains:

78% nitrogen
21% oxygen
1% inert gas such as argon
0.04% carbon dioxide
little water vapour
Exhaled air contains less oxygen and more carbon dioxide, it is also saturated with water vapour. Exhaled air contains:

The composition of exhaled air (air that is breathed out) is very different from the composition of inhaled air (air that is breathed in).
78% nitrogen
16% oxygen
1% inert gas such as argon
4% carbon dioxide
saturated with water vapour
The difference between the amount of oxygen in inhaled and exhaled air is equal to the difference in the amount of carbon dioxide in exhaled and inhaled air. This oxygen is used to originate the blood capillaries in the lungs which is the essential component of the breathing mechanism.
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