Why do people yawn?
When we are tired/bored, we don't breathe as deeply as normal. Yawning brings oxygen into the blood and moves carbon dioxide out.
Answered -
Older Answers
No one knows for sure.One theory is that when we are tired, we don't breathe deeply. Yawning helps us bring more O2 into the blood
Answered by Samuel M. -
The reasons for yawning are just as mysterious as the reasons for why yawning is contagious.
Answered by Daniel J. -
Yawning is an involuntary action that causes us to open our mouths wide and breathe in deeply. Even unborn babies yawn. Thanks!
Answered by Marie W. -
One theory about yawning is, our bodies induce yawning to drawn in more oxygen or remove a build-up of carbon dioxide. Chacha on!
Answered by Tasha C. -
One theory is that it is an involuntary way our body get extra oxygen when we are running low.
Answered by Steven M. -
One theory is that when we are bored or tired, we just don't breathe as deeply as we usually do. Thanks for using ChaCha!
Answered by Kyle P. -
Yawning keeps the brain cool, researchers say. Can I help you with anything else?
Answered by David M. -
About Carbon Dioxide
Carbon dioxide is a chemical compound composed of two oxygen atoms bonded to a single carbon atom. CO2 is increasing due to the burning of fossil fuels, leading to global warming. Carbon dioxide is often confused with carbon monoxide.
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