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TREYJIBADE

  • 4 years ago

is there a DEFINITE reason why you yawn?

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  1. JonnyMcA
    • 4 years ago
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    Unfortunately not. the jury is still out on the exact reason or reasons why we and other animals yawn. Im sure you have looked at this before, but wiki has a nice article on the suggested reasons http://en.wikipedia.org/wiki/Yawn#Proposed_causes

  2. jopol
    • 4 years ago
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    its because u get bored

  3. heena
    • 4 years ago
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    due to having lack of oxygen in rbc when the amount of co2 increases hope so

  4. CeeCee
    • 4 years ago
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    there is no exact reason YET but the most famous and credible reason as of now is the lack of oxygen in the body. Notice that a person yawns when he or she feels really sleepy or tired or perhaps a little dizzy. This is due to the lack of oxygen in the brain. So, the main reaction of the person is to yawn which makes the person concern open his/her mouth really big thus sucking in large amounts of oxygen that would compensate for the lack of it. :D

  5. CeeCee
    • 4 years ago
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    *makes the person concerned

  6. aroub
    • 4 years ago
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    is it a good thing or a bad thing???

  7. CeeCee
    • 4 years ago
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    I guess it's a good thing then because if the reason above is true, then it's a way of the body to recuperate from lack of oxygen which is a bad thing for the body. :/

  8. aks42
    • 4 years ago
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    it is really when u tired..................................scientifically their is no explanation

  9. BiomedStudent
    • 4 years ago
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    No definite answer, juries out on it. It happens with the expansion and contraction of the diaphram under the lungs though

  10. TREYJIBADE
    • 4 years ago
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    its funny the things scientist cant explain

  11. BiomedStudent
    • 4 years ago
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    Though there is merit on the theory that the Autonomic nervous system with the medulla oblongata and the pons regions slow down the breathing rate and we see a drop in O2, this could trigger an automatic 'gasping' reflex that is the yawn

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