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Why do we yawn?

Dear Dr. Cory:

Why do we yawn?

Allison Edgar Park Ridge, Illinois

Dear Allison:

Yawning is a way for your body to get extra oxygen when you are tired. When you yawn, you breathe in slowly and deeply and then let the air back out.

Yawning also helps to open your eustachian tube. This is the tube that connects the middle ear to the back of the throat. You may feel the need to open your eustachian tube when you fly in an airplane, for example, to relieve the change in air pressure.
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Title Annotation:Ask Doctor Cory; Parent's Guide
Author:SerVaas, Cory
Publication:Children's Playmate
Date:Dec 1, 1996
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