2007-05-04 23:41:13 · 9 answers · asked by jim g 1 in Science & Mathematics ➔ Biology
I can only speak for myself. The most common reason why I yawn is listening to a Hillary R or Nancy P speech. Hearing somone drone about subjects they know little about and with a great deal of self interest and bravado makes me tired and stressted. When Im overly tired and stressed, muscles tense and fatigue and thats a reaction I have to it.
2007-05-04 23:46:23 · answer #1 · answered by koalatcomics 7 · 0⤊ 1⤋
A yawn is a reflex of deep inhalation and exhalation associated with being tired, with a need to sleep, or from lack of stimulation. Pandiculation is the term for the act of stretching and yawning.
Yawning is a powerful non-verbal message with several possible meanings, depending on the circumstances. It is also claimed to help increase the state of alertness of a person. It could possibly be from lack of oxygen. The exact causes of yawning are still unknown.
2007-05-05 07:14:06 · answer #2 · answered by Akilesh - Internet Undertaker 7 · 0⤊ 0⤋
yawn comes to you when u doing something good !!
So if you studying (which is supposed to be good) you yawn, when you working (which is also a good thing) you yawn ..
also, it happens when you bored (i.e. watching a boring movie .. etc)
but yawn never happens to you when u doing something interesting, even if you tired ...
also it is contageous .. and if u saw someone doing it u do it .. and i dont know why i dont !!
2007-05-05 08:21:49 · answer #3 · answered by Sea Bass 4 · 0⤊ 0⤋
your brain is trying to get enough oxygen, so you need to yawn to give it the oxygen it needs i think. Plus it could mean that you are tired and need to get some sleep.
2007-05-05 06:53:53 · answer #4 · answered by Kris 1 · 0⤊ 0⤋
it means that your lungs are not suppling your heart with enough oxygen so when you yawn it forces them to go wider and increase your air intake thus giving your blood more oxygen [not definte]
2007-05-05 07:01:32 · answer #5 · answered by whoever39 2 · 0⤊ 0⤋
people yawn when they feel tired!
2007-05-05 06:49:44 · answer #6 · answered by Anonymous · 0⤊ 0⤋
Because they're watching daytime TV.
2007-05-05 06:50:54 · answer #7 · answered by bennyonacid 2 · 0⤊ 0⤋
Lack of oxygen.....
Still does not answer why it is contagious though????
2007-05-05 06:49:37 · answer #8 · answered by Anonymous · 0⤊ 0⤋
i think it means that your not getting enough oxygen. if i remember correctly.
2007-05-05 06:47:44 · answer #9 · answered by ~*Mrs.Madrox*~ 2 · 0⤊ 0⤋