2006-12-07 08:48:33 · 17 answers · asked by amelia-rose 2 in Health ➔ Other - Health
yes, yawning puts more oxygen in your blood, but your blood is already saturated in oxygen. yawning really occurs to allow you to exhale more carbon dioxide, raising the pH level in your blood so your body can maintain homeostasis. :-)
2006-12-07 08:57:23 · answer #1 · answered by lisa42088 3 · 1⤊ 0⤋
It is to get an amount of oxygen to wake the brain up. When someone is yawning poke their toung it stops them mid yawn then they will be frustrated because they wont have completed the yawn. Also the reason it is catching is because the brain sub-consiencly see's someone else yawning and feels that it then needs to yawn also reading about yawning sometimes causes this i have yawned 5 times whilst doing this question. Hope this helps.
2006-12-07 17:36:34 · answer #2 · answered by Ab 1 · 1⤊ 0⤋
As well as the oxygen to the brain answer; there is another reason. You may yawn because you have seen someone else yawning. This is becuase you are expressing/communicating a similar emotion in an attempt to relate to that person who yawned first.
This is what i personally think- could be rubbish though!
2006-12-07 17:01:33 · answer #3 · answered by Tom 2 · 1⤊ 0⤋
Yawning is your bodys way of trying to relax you after physical or mental stimulation. If you yawn it is often followed by the urge to stretch. Then reason it is contagiuos is we are social animals and it signals to the rest of us that its time to rest. Before we invented the light blub or lived with candle light the onset of darkness was a trigger on our brains and it helped the group to settle down for the night so our activities were synrochised as a group. By yawning often first by dominate male or female of the group sent out a social signal that it was time to sleep and rest. It also signaled that the group was in a safe enviroment to relax. It would be no good to have tired hunter/gathers in the group while foraging for food and miss a potenial meal or become a meal by another predator. Because they were not alert. The survival of the group relied on the been alert so thats why its contagious. To get the group to rest as one. And be alert for danger and finding food durning daylight. Hence when some one yawns in a meeting or at college others tend to yawn as there is not danger around and the need to surivive as a group depends on all of them been alert at the sametime. The survival instinct is still there. With modern living we tend to forget our past and that once we not at the top of the food chain. We needed our wits about us just to surivive day to day. Just like a group of woman living together over a period of time end up having periods at the same time. Synchronization of certain behavours insured the greater chance of survival of the group and passing on genes. Hope that helped.....
2006-12-07 17:00:53 · answer #4 · answered by wandera1970 6 · 0⤊ 1⤋
People are right in saying that it's to get Oxygen to the brain. But that's not it's only purpose. It also clears your ear canals by stretching them and it opens the whole system up. If a baby did not yawn, it would be deaf by the time it is 2. Interesting fact for you, lol. But yeah it is primarily for oxygenating the brain i think... hard to get blood up there in the noggin!
2006-12-07 17:00:00 · answer #5 · answered by Aramiak 2 · 1⤊ 1⤋
.
I think its something to do with sending extra oxygen to the brain ,
i do know if someone yawns in a room other people will start yawning it very infectious
2006-12-08 08:08:05 · answer #6 · answered by Anonymous · 0⤊ 0⤋
It's your bodys way of getting oxygen to the brain fast. The reason we do it when we're tired is because, when we're tired are bodys starts to slow down as does are brain. But if the brain slows faster then the body i.e you've had a very menatally exhausting day. Then the body needs to wake the brain up. Equally if your body starts to slow first then the brain sends it quick shock like a jolt that people have when there about to fall asleep.
2006-12-07 16:57:38 · answer #7 · answered by Anonymous · 1⤊ 0⤋
you yawn because you have too much Carbon dioxide (CO2) lying at the bottom of your lungs. sending a trigger to your brain to make you yawn to get alot of oxygen to your lungs and start everything moving. it is not the levels of oxygen that make you yawn it is levels of carbon dioxide. Levels of carbon dioxide also trigger you to breath.
2006-12-07 17:00:29 · answer #8 · answered by uhm_yeh 2 · 1⤊ 0⤋
Its a process of the body to obtain more oxygen
2006-12-07 16:52:11 · answer #9 · answered by I is I 2 · 1⤊ 1⤋
to get more oxygen to the brain so you wont fall asleep
2006-12-07 16:53:55 · answer #10 · answered by Lola S 5 · 1⤊ 0⤋