# A yawn helps draw in large amounts of air to increase blood pressure, heart rate and blood oxygen levels. These physiological changes improve our motor function and alertness, helping to wake us up when we're tired or bored...!!!
# 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...!!!
- Misra Raahul
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