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Why do we yawn?

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Why do we yawn?

Posted by Palak Agarwala 6 years, 10 months ago

CBSE > Class 07 > Science

3 answers

Anik Kumar 6 years, 10 months ago

We yawn after wake up because during sleeping breathing rate is slow in which our body doesnot get oxygen for energy required by our body, for maintain required energy we yawn

Atharva Dixit 6 years, 10 months ago

When we are having lack of oxygen that time we yawn ? ?

Eshant Rai 6 years, 10 months ago

Yanh is a thing from which we make thread

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