Why do we yawn?


Top Answer
User Avatar
Wiki User
Answered 2015-08-27 21:05:06

Yawning It is actually still an unknown mystery of life. Though there are good hypotheses supporting why humans and animals yawn, they are not conclusive.

Any explanation about why we yawn will have to explain a number of interesting observations:

  • Yawning occurs even when oxygen and carbon dioxide levels are normal.
  • Yawning may make others yawn (that is, it seems "contagious") and may indicate behavior based on social cues.
Other hypotheses:
  • One is that when we are bored or tired, we just don't breathe as deeply as we usually do. As this theory goes, our bodies take in less oxygen because our breathing has slowed. Therefore, yawning helps us bring more oxygen into the blood and move more carbon dioxide out of the blood

    (This theory could be true, because I've never yawned while playing sports or running a mile before.)

  • Most people think it is that you are tired or there isn't enough oxygen coming to the brain. From recent studies it is because your head is over-heated.
  • Another person noticed that he had been sitting for about half an hour being bored and dreamy. When he stood up, he started yawning 2 or 3 times. Maybe his body was doing the opposite of maintaining homeostasis, preparing for an increased heart rate when his body stood up, as if about to start moving and needing oxygen.

Your Answer

Related Questions

No. They yawn for the same reasons we do.

The word 'yawn' is both a verb (yawn, yawns, yawning, yawned) and a noun (yawn, yawns). Examples:Verb: I began to yawn in the middle of the lecture.Noun: The comedian's joke met with a big yawn.An adjective is a word that describes a noun, for example: a big yawn.

they yawn because when you yawn it passes on to other people . so you yawn then someone's right next to you then i think they inhale then they start to yawn ?

how do you know you yawn if you are sleeping?

no the ant dosen't yawn

I yawn when I have swine flu

Yes, yawn is an onomatopoeia.

I wish you would quit yawning because it’s making me want to yawn.

it's when you yawn real big

to yawn is 'bailler' in French.

the homophone for yawn! haha get it lol

Actually, you do not yawn when your tired Specifically. When you yawn, your releasing Carbon Dioxide from your body to keep you alert and awake.

People yawn because they are bore.....right now,their is no approved causal of yawnimg

People don't yawn. A yawn is a gasp for air, so now you know the anwer!

no pigs do not yawn because they are animals and all animals do not yawn exept from dog. thank you

"Yawned"; "yawn" is a regular verb.

We yawn cause of the lack of oxygen.

well, why do you yawn?:) It's the same reason!

When I am sleepy or tired I yawn.

The past form of YAWN is YAWNED.

Yawn was born in Chicago, in Illinois, USA.

you can never tell how many times you yawn because we all yawn at different rates

You do not yawn when you are relaxed because scientists have proven that when you yawn, you either need sleep or it is because you are tired.

We yawn because We yawn because we need to get rid of CO2, so that would mean if you don't yawn you will eventually die from hypercapnia (too much CO2)!

Copyright ยฉ 2020 Multiply Media, LLC. All Rights Reserved. The material on this site can not be reproduced, distributed, transmitted, cached or otherwise used, except with prior written permission of Multiply.