2007-01-02 00:41:13 · 7 answers · asked by coopersabre 1 in Health ➔ Other - Health
I DONT REALLY KNOW BUT JUST READING YOUR QUESTION MADE ME YAWN! MAYBE THIS SITE WILL HELP:::::::
http://science.howstuffworks.com/question572.htm
2007-01-02 00:49:50 · answer #1 · answered by sugarplum_177 2 · 0⤊ 0⤋
The Physiological Theory -- Our bodies induce yawning to drawn in more oxygen or remove a build-up of carbon dioxide. This theory helps explain why we yawn in groups. Larger groups produce more carbon dioxide, which means our bodies would act to draw in more oxygen and get rid of the excess carbon dioxide. However, if our bodies make us yawn to drawn in needed oxygen, wouldn't we yawn during exercise? Robert Provine, a psychologist at the University of Maryland, Baltimore County, and a leading expert on yawning, has tested this theory. Giving people additional oxygen didn't decrease yawning and decreasing the amount of carbon dioxide in a subject's environment also didn't prevent yawning.
# The Evolution Theory -- Some think that yawning is something that began with our ancestors, who used yawning to show their teeth and intimidate others. An offshoot of this theory is the idea that yawning developed from early man as a signal for us to change activities.
# The Boredom Theory -- In the dictionary, yawning is said to be caused by boredom, fatigue or drowsiness. Although we do tend to yawn when bored or tired, this theory doesn't explain why Olympic athletes yawn right before they compete in their event. It's doubtful that they are bored with the world watching them.
The simple truth is that even though humans have been yawning for possibly as long as they have existed, we have no clue as to why we do it. Maybe it serves some healthful purpose. It does cause us to draw in more air and our hearts to race faster than normal, but so does exercise. There's still much we don't understand about our own brains, so maybe yawning is triggered by some area of the brain we have yet to discover. We do know that yawning is not limited to man. Cats, dogs, even fish yawn, which leads us back to the idea that yawning is some form of communication.
Src:http://science.howstuffworks.com/question572.htm
2007-01-02 00:45:28 · answer #2 · answered by sticbaby03 2 · 0⤊ 0⤋
here is what i think.... when a person yawns it is our bodies way of taking in pure oxygen. so i think when a person yawns the are making some kind of atmosphere to where it makes other peoples bodies crave more oxygen. thus causing them to yawn as well.
2007-01-02 00:45:28 · answer #3 · answered by www.myspace.com/jimmycody 2 · 0⤊ 1⤋
Yawning is contagious like a cold.....
2007-01-02 00:43:50 · answer #4 · answered by Anonymous · 0⤊ 0⤋
some believe it has to do with a physiological response that dates back to cro-magnan days...
in reality we yawn when the body is transition from a period of inactivity to being active or vice versa...
2007-01-02 00:45:50 · answer #5 · answered by lv_consultant 7 · 0⤊ 0⤋
i would not say yaning is like a cold but it does seem like when one yans the others do the dame. Power of suggestion I think.
Hes i do it as well.
2007-01-02 00:56:55 · answer #6 · answered by Anonymous · 0⤊ 0⤋
The same reason that hearing someone laughing hysterically makes you laugh.
2007-01-02 00:44:03 · answer #7 · answered by Anonymous · 0⤊ 0⤋