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you are not breathing deeply enough so as a reflex to low but not lifethreatiningly low O2 levels yer body takes in more O2.

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16y ago

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Related Questions

When does a dog yawn?

A dog is like a human , it yawns when it is tired or about to go to sleep! :D It also yawns as a sign of disapproval, or when it is stressed, and needs to calm itself down.


Do you yawn when you are tired?

yes when you are tired and your body is trying to stay awake it yawns


When a person tired he yawns?

It's common sese man!


When a person is tired he yawns?

It's common sese man!


What does 1 and 2 and 3 yawns mean?

1 yawn means you are tired. 2 yawns means you need a nap. 3 yawns means you need to go to sleep.


Why do you think we yawn when we are sleepy or drowsy?

your body yawns because it needs more oxygen, when we get tired that's when the body gets low on oxygen


Do dogs yawn?

Yes they do. Our pup yawns all the time. She must be tired from her day of laying around, eating, and chasing her tail.


Do you get drowsy if some one yawns close from you?

I don't know about "drowsy" but I have heard that if someone near you yawns, you yawn too. Like yawns are contagious. Yawns don't mean that you're tired. It also means that you're not getting enough oxygen, but that has not been scientifically tested.


Why are yawns not contagious?

Actually that is a lie. Yawns are contagious.


How are yawns caused?

Yawns are caused by a combination of factors, including fatigue, boredom, and changes in brain temperature. When we yawn, it is thought to help regulate brain activity and increase oxygen intake, but the exact reason for why we yawn is not fully understood.


Are yawns contagious and how?

No.


Are yawns really contagiou?

yes, yawns are contagious and you can go to science.howstuffworks.com/life/contagious-yawn.htm