What causes yawning?
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Answered by
2
Hey mate here is your answer....
When the oxygen content in the brain is less then our brain to take in more oxygen causes yawning....
When the oxygen content in the brain is less then our brain to take in more oxygen causes yawning....
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4
when we get extremely bored, restless, ,tension so we felt sleepy it cause us to yawn. it is scientifically proven.
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Hope It Help You.
Happy New Year.
If you satisfied mark me branliest. ♥
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