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Lack of oxygen to the brain causes an involuntary reaction that we know as a yawn.

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15y ago

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Which animals yawn and which don't?

Most mammals yawn, including humans, primates, dogs, and cats. Reptiles, fish, and insects do not exhibit yawning behavior.


What is a homophone for yawn?

the homophone for yawn is.............you! haha get it lol


Do Mosquitoes yawn?

Mosquitoes have spiracles, which are tiny tubes carrying air through their bodies. They do not have lungs like we do. They force air in and out through their bodies. They get oxygen like we do but do not breathe in the same manner.


How do you spell the sound a yawn makes?

The typical written expression for a yawn sound is "ho hum."


What is the past participle of yawn?

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


Can cows yawn?

No whales do not yawn.


Is yawn an onomatopoeia?

Yes, yawn is an onomatopoeia.


Does a snail yawn?

yes they yawn quietly


Can you give a sentence for the word yawn?

Insects do not yawn. People necessarily do not yawn only when they are tired. Most people, after reading this, will yawn.


Why do people yawn when they are cold?

A yawn is normally a response to a change in activity, although if you did not get enough sleep, you could become tired and yawn.


Is yawn an adjective?

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.


Why do dogs yawn?

Dogs yawn as a way to calm themselves when they are stressed. An agility dog (dog that does agility tricks) will often yawn just before he does his run as a way to "stretch", or loosen himself up before doing his run. If you have a dog that yawns during obedience classes, it indicates a need for him to be there, and over time he will become less stressed and more relaxed and you will find him yawning less and less. Dogs and other mammals (and some non-mammals) yawn for the same reason that people do: it is a reflexive action due to a lack of oxygen in one's system (most people breathe more slowly when they are tired or bored, which causes a lack of oxygen, which then causes yawning).