2006-09-22 08:41:22 · 10 answers · asked by bogstandard 2 in Science & Mathematics ➔ Biology
Yawning can be for several reasons, but it does equalize air pressure on both side of the eardrum by opening the eustachian tubes and allowing air to pass into the inner ear. If you are going up a mountain in your car and start to get an uncomfortable feeling in your ears it is because the air pressure outside your eardrum is falling while the pressure inside the eardrum is remaining constant. If you yawn, the pressure will be equalized and the uncomfortable feeling will immediately cease. Same thing coming back down the mountain.
2006-09-22 08:48:00 · answer #1 · answered by PaulCyp 7 · 1⤊ 0⤋
There have been a number of hypotheses for the reason why people yawn, including regulation of carbon dioxide and oxygen in the blood, or temperature regulation in the body, but none of these have ever been proven.
2006-09-22 08:44:04 · answer #2 · answered by DavidK93 7 · 0⤊ 0⤋
Maybe the pressure gets out of balance when your tired or bored, or hungry that makes you yawn too.
2006-09-22 08:49:41 · answer #3 · answered by floppity 7 · 0⤊ 0⤋
Besides the others it is also considered an act or aggression by revealing your teeth according to National Geographic Mag.
2006-09-22 08:52:19 · answer #4 · answered by Anonymous · 0⤊ 0⤋
as soon as I read your question I yawned i think it might be contagious, I made a dog yawn and then go to sleep it can be suggestive
2006-09-22 08:53:23 · answer #5 · answered by msgroms 1 · 1⤊ 0⤋
I heard when you yawn you are lacking air in your lungs
2006-09-22 08:57:38 · answer #6 · answered by Anonymous · 0⤊ 0⤋
I heard it was due to lack of oxygen in the brain
2006-09-22 09:01:04 · answer #7 · answered by Anonymous · 0⤊ 0⤋
All i know is that i am knackered and i cannot stop yawning
2006-09-22 09:00:05 · answer #8 · answered by Glenn M 4 · 0⤊ 0⤋
It's something to do with carbon dioxide.
2006-09-22 09:24:42 · answer #9 · answered by sootster6001 1 · 0⤊ 0⤋
its your bodys way of getting more oxygen.
2006-09-22 08:44:54 · answer #10 · answered by Spook 4 · 2⤊ 0⤋