Why do we yawn?
Our bodies induce yawning to draw in more oxygen or remove carbon dioxide build-up. Research shows that 11-week old fetuses yawn.
Answered -
Older Answers
We yawn because it helps us bring more oxygen into the blood and move more carbon dioxide out of the blood. ChaCha!
Answered by David F. -
The most plausible explanation is that we yawn because oxygen levels in our lungs are low. ChaCha on!
Answered by Jansen A. -
A plausible explanation, and the one that is taught in medical school, is that we yawn because oxygen levels in our lungs are low.
Answered by Terence W. -
We yawn due to a lack of oxygen.
Answered by Kiley W. -
Humans have been yawning for possibly as long as they have existed, we have no clue as to why we do it. Thanks, ChaCha!
Answered by Marina M. -
The most plausible explanation, is that we yawn because oxygen levels in our lungs are low. Thanks for asking ChaCha.
Answered by Marty W. -
While it is a mystery, many believe we yawn because your crave oxygen when you are bored or tired, due to a lack of it. ChaCha!
Answered by Andrew S. -
The most plausible explanation, one taught in medical school, is that we yawn because oxygen levels in our lungs are low.
Answered by Melissa 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.
About Oxygen
Oxygen is a television channel geared towards women owned by NBCUniversal. The channel's slogan is ''Live Out Loud.'' Some of the channel's original series include 'The Bad Girls Club,' 'All About Aubrey,' 'Snapped,' 'Tori & Dean: Home Sweet Hollywood,' and 'Jersey Couture.'
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