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Why yawning come?

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Why yawning come?

Posted by Knowledge Time 5 years ago

CBSE > Class 11 > Biology

1 answers

Haiderabbas Aghariya 5 years ago

One is that when we are bored or tired, we just don't breathe as deeply as we usually do. As this theory goes, our bodies take in less oxygen because our breathing has slowed. Therefore, yawning helps us bring more oxygen into the blood and move more carbon dioxide out of the blood.

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