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Old 08-16-2003   #1
monster
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my question

i have a question and will not rest until it is answered:

y'know how when your body does stuff, it's for a reason.
yeah, well, what are yawns for?
they don't do anything except tell other people that it's past your bed time
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Old 08-16-2003   #2
Grunt
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uhm.... i was told once that its because your tired you dont breathe as fast. so yawns are like a massive intake of air to get alot of oxygen inside your lungs.

(experiment: take very small breaths.....after a while you will yawn)
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Old 08-17-2003   #3
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"Its assumed that yawning occurs because we are tired or bored, but there isnít any hard evidence to support these beliefs.
The most plausible explanation, and the one that is taught in medical school, is that we yawn because oxygen levels in our lungs are low. Studies have shown that during normal, at-rest breathing, we donít use anywhere near our lung capacity; for the most part, we just use the air sacs at the bottom of the lungs. If the air sacs, called alveoli, donít get fresh air, they partially collapse and the lungs stiffen a bit. As a result, itís believed, our brain prompts the body to either sigh or take a yawn to get more air into the lungs.
Fetuses have been observed yawning in the womb, yet itís known that they donít take oxygen in through their lungs. And yawning seems to be a symptom of multiple sclerosis and other medical conditions, for reasons unclear."

I edited that a bit... I think yawning is a psychological phenomenon... I know that yawning is definitely psychologically contagious but otherwise I agree with this exerpt and the previous reply :D Keep yawnin!
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Old 09-04-2003   #4
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something about oxygen, like grunt sed...but why does it only happen at night? or early morning? or...well, when you're tired i guess. ok i'll shut up...
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