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We breathe in air and breathe it out. Oxygen (O2) is picked up from the air in our lungs and carbon dioxide (CO2) is released into that air to be exhaled. This is simply gas exchange that is essential for life. The number of protons in an atom identifies which element it is. (And only that, by the way.) Would it be helpful to say that hemoglobin, the component of red blood cells that transports the oxygen, has an atom of iron in it, and that the iron has 26 protons it its nucleus? It is sufficient to say that hemogloben is an iron based metaloprotein that is responsible for oxygen transport in the blood of vertebrates. Adding a "proton count" doesn't really clarify the points made. It may actually act to confuse things. If the question were looked at as a comparison between animal and plant respiration, the "chosen gas" the organism will want to pick up is selected based on what chemical processes are necessary for life in the cells of the two organisms. We need O2 to survive. Plants need CO2 in the process of photosynthesis. And each happens to be expiring what the other needs. Is there a "balance" of sorts there?

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16y ago

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How does photosynthesis produce oxygen?

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What produes carbon dioxide?

Humans and animals produce carbon dioxide (CO2). They breath in oxygen, and in the mitochondria of cells, it creates carbon dioxide.


Why do you breath out more carbon dioxide then you breath in?

You produce carbon dioxide through cellular respiration when you breath in air. Cellular respiration produces carbon dioxide from converting oxygen into it through a long process and also produces energy.


How does plants get the carbon dioxide?

Plants get carbon dioxide from the air we exhale. We breath out carbon dioxide and plants give us oxygen. So when we breath oxygen the air that we exhale is carbon dioxide that goes to plants.


Do you breath out carbon dioxide?

Yes, one of the waste products of cellular respiration is carbon dioxide (six molecules of carbon dioxide to be exact), as well as six molecules of water.


Where can you find a cell that gives off oxygen and carbon dioxide?

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Are high levels of carbon dioxide bad?

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What gas plant do produce that animal use?

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Why isn't it correct that we breathe in only oxygen and breathe out only carbon dioxide?

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