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Why we yawn when were sleepy

Lol my dad wants to know why we yawn when were sleepy if anyone knows thankx for the answer

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Answer #1

Usually when you’re tired you don’t breath as deeply and as often…so you yawn to get more oxygen into your body.

Answer #2

Your body’s systems slow a little when you are tired, so your breathing may slow. Yawning is just when your body realises and needs to take in more oxygen to keep your functioning =)

Answer #3

I think it is just coincidence that it occurs when we are sleepy. I think anytime we yawn it is the body’s way of seeking more oxygen.

Answer #4

lol I heard yawning is to give more oxygen to the brain dont know what that has to do with sleeping but anyway

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