why do we yawn when we are sleepy
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Answer:
because it gives us satisfaction when we r sleepy
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when we are sleepy or drowsy we generally yawn because our brain cells generally lack of oxygen. We generally take a deep breath during a yawn which helps to supply oxygen to the whole body including the brain and makes us get relaxed
Explanation:
Yawn makes us inhale larger volumes of fresh air ie oxygen. Yawning also makes extra carbon dioxide to be sent out to energise the person. So all these are not needed in deep sleep. During sleep brain has enough oxygen and sends out carbon dioxide at a regular pace through the lungs. Helping you connec
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