Why do we yawn ? Please answer my question.
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But there are many theories (ideas) about why people yawn. ... Therefore, yawning helps us bring more oxygen into the blood and move more carbon dioxide out of the blood. Yawning, then, would be an involuntary reflex (something we can't really control) to help us control our oxygen and carbon dioxide levels.
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Because yawning helps our body to be cool as body needs to wake it up which helps the lungs and tissues to be stretched up and it is also said that when we yawn we are feeling tired and our body needs some rest
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