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प्रश्न
Whenever we feel drowsy or sleepy, we start yawning. Does yawning help us in any way?
लघु उत्तरीय
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उत्तर
During drowsiness, our breathing rate slows down. The lungs do not get enough oxygen from the air resulting in yawning. Yawning brings extra oxygen into the lungs and removes more carbon dioxide and thus, helping us to keep awake.
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