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Why is Yawnig So Contagious?

Posted by srmcurology on Sat, 06 Nov 2010         
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Yawning commonly occurs when we are tired or drowsy. People also yawn when they are bored. Why do we yawn and what is its exact purpose is still an unresolved mystery. Everyone yawns - babies to adults, even the animal’s yawn, and in fact it can be noted as early as in an eleven or twelve week’s old fetus in the womb.    Yawn is an involuntary body reflex related to the respiratory tract of the body controlled by our spinal cord and the hypothalamus region of the brain. Yawning increases the oxy... Read More
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1 Comment(s)
 

minil

05 Aug 11
12:22 PM

Very true.yawned twice already. interesting blog. thanks

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