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Asked by domino90 to Chris, Hayley, Jimi, Maddison, Omur on 14 Mar 2016. This question was also asked by libs:).
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Jimi Wills answered on 14 Mar 2016:
It’s to do with the chemistry that happens in your body.
We use food as an energy source. But the way we unlock that energy is that our cells combine the food with oxygen in a chemical reaction. The product of the reaction is carbon dioxide, water, and energy that the cell can use… e.g. your muscle cells use the energy to contract the muscles.
But you also need to get rid of the carbon dioxide. The gases are exchanged in your lungs… oxygen from the air goes into the blood, and carbon diaoxide from the blood goes into the air.
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Omur Tastan answered on 14 Mar 2016:
we breathe oxygen/air so we can use it to burn food and gain energy! ?
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Hayley Moulding answered on 15 Mar 2016:
We need oxygen to be able to breathe!!! Woo! Oxygen is essential for us to be able to breathe and all of the cells in our body to ‘respire’. This means to be able to use sugars and make our muscles work, our lungs breathe and our digestive system work. Air is important because we also need carbon dioxide, but that is usually useful for plants! Plants need to use carbon dioxide from the air to make sugars too! So what is cool as that we use oxygen to help with making our body work and muscles move, then we let out carbon dioxide. The carbon dioxide then is taken up by plants and used to make oxygen, which then humans breathe in!! Wahoo!!
Comments
bluebestie021 commented on :
is it possible to breathe in carbon dioxide
Hayley commented on :
Yeh we can. It isn’t good though when we do. Sometimes if we are near lots of pollution we can breathe in carbon dioxide. We will generally breathe it in though and that is okay. As long as there isn’t lots and lots.
Resh@science commented on :
We won’t be able to breath without oxygen.
Sammy commented on :
I strongly agree with that, @Resh@Science.
Hayley commented on :
Very true.
Ami_awesome commented on :
you need oxygen for your blood de-oxygenated and oxygenated
Hayley commented on :
Good point. Oxygenated is with oxygen in the blood, and de-oxygenated is without oxygen in the blood.
Sammy commented on :
Without oxygen you can’t even survive because oxygen gives us energy to breathe 🙂
Hayley commented on :
That is true. We need it. It is essential!
Deeps 2005 commented on :
Oxygen powers our muscles and our heart is a musclel . . .
Hayley commented on :
Yes it is! A really powerful muscle!!!