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There's a process called gas exchange which takes place in the lungs: put simply, both oxygen & carbon dioxide are transported around the body in the blood stream; when the blood reaches the lungs it does a trade - swapping waste CO2 (a by-product of the cellular respiration which is constantly going on in every cell in your body) for oxygen in the air you've just breathed in. So the air you breathe out contains that waste gas, plus the proportion of CO2 that was already in your last breath in.

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What goes into our nose when we breath?

When we inhale through the nose, we breathe in oxygen and some carbon dioxide. When we exhale, there is more carbon dioxide than oxygen. This is because the oxygen is absorbed and converted by the lungs into carbon dioxide.


Do humans inhale carbon dioxide?

Humans breathe in whatever happens to be in the air when they breathe in. If there is carbon dioxide then they will breathe it in as well as nitrogen and oxygen. However they only use the oxygen for respiration so they breathe out everything else with extra carbon dioxide.


Can carbon dioxide and oxygen be mixed?

Yes, carbon dioxide and oxygen can be mixed together. In fact, the air we breathe is a mixture of various gases, including carbon dioxide and oxygen. However, the optimal ratio for breathing is about 21% oxygen and less than 1% carbon dioxide.


Do you breathe mostly carbon dioxide?

No, air is mostly nitrogen and oxygen with very very little carbon dioxide (less than 1%)What you exhale is mostly nitrogen, oxygen, and some carbon dioxide.


How you breathe in air?

you breathe in something called oxygen and then breathe out something called carbon dioxide. Inside your body the oxygen gets running through your blood vessels ans heart and muscles. then even though you breathe in a bit of carbon dioxide- you breathe more out than in! :)


Most of the air you breathe in goes back into the atmosphere when you exhale?

When you breathe in, you take in oxygen and when you breathe out, you release carbon dioxide. Most of the air you breathe out is composed of nitrogen and oxygen with a slightly higher concentration of carbon dioxide than in the atmosphere. The oxygen you inhale is used by your cells for energy production, while the carbon dioxide is a waste product that is released back into the air.


Do you exhale oxygen?

You breathe in the complete mixture of all the gases in the air. Your body then extracts some of the oxygen for you to use and replaces it with carbon dioxide as a waste product. Then you breathe out the resulting mix, which has more carbon dioxide and less oxygen in it than what you breathed in.


How is the air you breathe in and the air you breathe out different?

The air you breathe out has different amounts of oxygen, nitrogen, carbon dioxide and a few other substances in it than the air you breathed in. Your lungs absorb a lot of the oxygen, for example, which is then carried by red blood cells to your heart and muscles. Your body also produces carbon dioxide as a kind of waste product which is in the air you breathe out. So the air you breathe out has less oxygen but more carbon dioxide than the air you breathed in did. There are also other smaller changes that you could look up.


What is the concentration of oxygen in the lungs normally compared to carbon dioxide?

The concentration of oxygen in the lungs is higher than the concentration of carbon dioxide. In the alveoli of the lungs, oxygen diffuses into the blood from the air we breathe, while carbon dioxide diffuses out of the blood into the alveoli to be exhaled. This exchange allows for the uptake of oxygen and the removal of carbon dioxide from the body.


What gas do we breathe small amounts of it out?

We breathe out the nitrogen and the oxygen in the air - though the amount of oxygen that goes out is less than the amount that goes in, since part of it is absorbed by our lungs.We also breathe out carbon dioxide, which is a result of our metabolism.


Is carbon dioxide lighter than oxygen?

The molecular weight of carbon dioxide is heavier than oxygen. Oxygen has a molecular weight of 32 g/mol, while carbon dioxide has a molecular weight of 44 g/mol. Therefore, carbon dioxide is heavier than oxygen.


Why is air breathed out rich in carbon dioxide than air breathed in?

When we breathe in air, we take in oxygen to be used in cellular respiration. During this process, the body produces carbon dioxide as a waste product. When we breathe out, the exhaled air contains a higher concentration of carbon dioxide because it is being expelled from our body after the oxygen has been used up.