Science, asked by Adhyaa, 1 year ago

Why do we yawn when we are tired or when we feel sleepy.....

Answers

Answered by writehere

we yawn when our brain needs more oxygen as when we yawn we open a big mouth and take air(oxygen) in.. so basically yawning is done when we are tired..
thanks.. :)

Answered by avantimohanjoshi

because the oxygen the our body is less

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