Why do humans yawn?
Yawning - induced by hypoxia (low oxygen levels in the blood stream). We need more air.
Answered -
Older Answers
There are several theories about why we yawn one isOur bodies Yawn to drawn in more oxygen or remove a build-up of carbon dioxide.
Answered by Karla D. -
No one knows for sure. A theory is our bodies take in less oxygen because breathing slows and it brings more oxygen into the blood
Answered by Melissa M. -
There is no logical explanation for why humans yawn. It's a chain reaction. Just reading this question made me yawn twice!
Answered by Kerryann B. -
Yawning is an involuntary action that causes us to open our mouths wide and breathe in deeply. We know it's involuntary (MORE).
Answered by Darrietta L. -
The yawning reflex can be triggered by drugs or by psychological, hormonal, or neurological stimuli. Thanks for using ChaCha!
Answered by Elayne J. -
Today we know that a yawn is a reflex of inhalation and exhalation that draws more oxygen into the bloodstream. ChaCha!
Answered by Lauren C. -
There reasons for yawing have been due to psychological, hormonal & neurological reasons. Thanks for asking ChaCha!
Answered by Mary Y. -
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.'
About Blood
The average adult has about five liters of blood inside of their body, coursing through their vessels, delivering essential elements, and removing harmful wastes. Without blood, the human body would stop working. Blood transports oxygen from the lungs to the body’s tissue and carbon dioxide from the body tissue to the lungs. Blood is the fluid of growth, transporting nourishment from digestion and hormones from glands throughout the body. Blood is the fluid of health, transporting disease fighting substances to the tissue and waste to the kidneys.
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