why do we yawn?

Question

suggest ways to yawn in style.

Answer 1

because the place you're at has a sudden lack of oxygen.
and the best way to yawn with etiquette is to cover your mouth.
and say excuse me

Answer 2

There's a really interesting medial answer to this question that I'll explain to you in 3 parts. I have to break it down into 3 parts as otherwise you might not understand what I'm trying to say. And it's important you do understand the stuff about blood n oxygen n the like so then when you do find yourself yawning you will be able to explain your faux pas, during the Best Man's speech, and all will be well in the world. So where was I? Ah yes, the 3 parts to the cause of boring, I mean yawning. Did I tell you that I saw this woman yawning on a bus, the other day. Quite literally, the whole of the bus started to yawn with her. Except me. Because I know all about the reasons for yawning, and so was prepared for the yawning effect before it took hold. Anyway, Part 1 of why we yawn goes like this...

Answer 3

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. The exact causes of yawning are still unknown.

yawning in style - always cover your mouth and say excuse me!

Answer 4

Next time you're in a meeting, try this little experiment: Take a big yawn, cover your mouth out of courtesy, and watch and see how many people yawn. There's a good chance that you'll set off a chain reaction of yawns. Before you finish reading this question of the day, it's likely that you will yawn at least once. Don't misunderstand, we aren't intending to bore you, but just reading about yawning will make you yawn, just as seeing or hearing someone else yawn makes us yawn.

What's behind this mysterious epidemic of yawning? First, let's look at what a yawn is. Yawning is an involuntary action that causes us to open our mouths wide and breathe in deeply. We know it's involuntary because we do it even before we are born. Research shows that 11-week-old fetuses yawn.

There are many parts of the body that are in action when you yawn. First, your mouth opens and jaw drops, allowing as much air to be taken in as possible. When you inhale, the air taken in is filling your lungs. Your abdominal muscles flex and your diaphragm is pushed down. The air you breath in expands the lungs to capacity and then some of the air is blown back out.

While the dictionary tells us that yawning is caused by being fatigued, drowsy or bored, scientists are discovering that there is more to yawning than what most people think. Not much is known about why we yawn or if it serves any useful function, and very little research has been done on the subject. However, there are several theories about why we yawn. Here are the three most common theories:

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.

Answer 5

we warn because our bodies suddenlly lack oxygen and the act of yawning draws in a lot of air with more oygen than normal breathing does. this can be caused by changes in the oxygen level of the environment, extreme boredom or tiredness which lowers the rate of breathing and thus lowers the amount of oxygen in the blood.
the best way to yawn in style is: just as you are about to yawn, pull out a lace-edged silk handkerchief and cover your mouth then when u are through, dab delicately on your lips and say, "Oh, dear me!"
or avoid yawning all togther and just take deep regular breaths as the urge comes on you.

Answer 6

we yawn when our brain is low on oxygen.

When we're tired, we tend to take smaller breaths, because our fatigued body is trying to put us to sleep.
Otherwise, when we see another person yawn, our brain tells us a signal that there might not be enough oxygen, so it makes us yawn too. That's why yawns are contagious, even when we're not tired or bored.

Answer 7

Surprisingly it can be for a few reasons. First being the most obvious yes it is because we are tired, and we don't breathe as deeply or as much when we are tired, but also it is a mental note to your body from your brain saying your tired whether you are or not. Why do you think yawns are contagious? Cause when you see them your brain takes it as your own body is tired.

Answer 8

It's your body saying you need more oxygen, I don't think there are any ''stylish'' ways to yawn, but if there is it would probably be keeping your mouth closed and not making any noise.

Answer 9

We looked up answers to this question a few weeks ago for medical
reasons, here is the answer we got. You need to follow the link it's all
interesting and it leads you to form your own conclusion.

http://science.howstuffworks.com/question572.htm

As for yawning I try to imitate animals sometimes, with the tounge et al. or
even the way the Three Stooges do it.

Answer 10

we yawn because there is a lack of oxygen to the brain. it has nothing to do with being tired or just waking up.