Friday, March 6, 2009

What is the purpose of yawn?



One usually yawns when bored or tired. Yawning makes you draw in breath, filling your lungs with air. This increases the oxygen supply to the blood to help wake yourself up.

17 comments:

  1. but why everyone do the same when somebody yawns, i mean is it contagious

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  2. Did you know that a laugh is actually a nervous reaction caused by the diaphragm going into spasms? In monkeys it is a sign of fear, can't remember where I read it but essentially it's a sign of subconscious panic when the brain cannot work out a problem - ha ha

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  3. yeah, akskhanbl..it is sometime contagious,lol..

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  4. When your full, you will yawn too...hahaha

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  5. Seeing somebody yawning probably will remind you that your brain is short of oxygen too.. that's we thought it's contagious.. hehehehe..

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  6. Hmmm, I've never really thought about it. Interesting! Thanks for stopping by my blog :)

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  7. Fantatic simple facts. We all in our family enjoy these posts from you.

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  8. That's a cool fact! Thanks for sharing.
    I've always wondered though, why people yawn, when other people yawn. The only awnser I ever found, is that you are more "epathic" when you *respond* to someone yawning, by yawning yourself.

    Don't know if it's true, so I can't portrait it as a fact...

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  9. haha, I know this. Thanks for sharing^^

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  10. Yet there is no scientific proof for that reason at all, of why its being contagious. Not even to the reason why we yawn, it doesn't mean you're sleepy or something to do with sleep deprivation at all.

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  11. thanks for sharing these bunch of info!nice blog you have here!

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  12. nice blog site, very informative and fun trivia! :)

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  13. very interesting,thanks for sharing

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  14. That's a cool fact! Thanks for sharing.

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  15. Hi...hi..... Good Question :)
    I Don't know what is the purpose, but I like It Very much...... hhhhuuuuuaaaach (Yawn again )

    Regards

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