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The importance of physical activity
The role of genetics in lifespan
How to maintain a healthy diet
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MORE IDEAS ON THIS
Scientists studying this reflex have proposed several reasons for the phenomenon. A yawn is a reflex that may be triggered by sleepiness, stress, boredom, or seeing another person yawn.
There are several reasons for yawning. snakes yawn to realign their jaws after eating and to aid respirat...
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Cortisol levels increase after yawning and may increase alertness and the need for action.
Psychologists think yawning helps improve blood flow to the brain. The premise is that stretching the jaw increases blood flow to the face, head, and neck, while the deep breath of a yawn forc...
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221 reads
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