Why is it that when we are injured, it becomes as if you don’t have enough oxygen?

Question

Why is it that when we are injured, it becomes as if you don’t have enough oxygen?

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Answer 1

You mean when you start breathing heavily? In that case it’s typically because of your fight or flight response taking over.

Normal breathing doesn’t remove all the excess CO2 from your lungs. Breathing really heavily moves more fresh air into your lungs than usual, which is helpful when you’re about to fight something or run away. When you get injured or fall or something unexpected, the body just doesn’t know if the danger is gone.