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Asked by tiger75 to Vincent, Luis, Joe, Joanna, Hannah on 22 Jun 2016.
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Hannah Grist answered on 22 Jun 2016:
That’s a good question :-).
When we breathe, we are taking air into our lungs. The lungs are very clever, and they take oxygen out of the air inside, before pushing all the rest of the air out again. So we breathe to get oxygen inside our bodies.
Your blood picks up the oxygen from your lungs, like a Tesco lorry picking up shopping, and then carries it all the way round the body and delivers it to all the bits that need it.
Oxygen is really important for lots of things in your body, like keeping your brain going. It’s also really important for things like your muscles to work. Without oxygen, you wouldn’t be able to run, or jump, or even move!
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Vincent Keenan answered on 23 Jun 2016:
Good question! Our bodies require oxygen for essential processes in our cells, so we use our lungs to inhale air, which includes oxygen. Our bodies also produce carbon dioxide from these essential cell processes, this is bad for us, so it is then transported to the lungs. The cool thing is we inhale what we need, and exhale what we don’t! Cool right! 😀
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