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Yawn - Wikipedia

en.wikipedia.org/wiki/Yawn

A yawn is a reflex consisting of the simultaneous inhalation of air and the stretching of the ..... George Washington said, "If You Cough, Sneeze, Sigh, or Yawn, do it not Loud but Privately; a...

Why We Yawn - WebMD

www.webmd.com/brain/news/20110923/why-we-yawn

Sep 23, 2011 ... 23, 2011-- Why do we yawn? ... So do most vertebrate animals. ... When you start to yawn, powerful stretching of the jaw increases blood flow in ...

Facts About Yawning: Why We Do It, Why It's Contagious And More ...

www.huffingtonpost.com/2013/06/10/facts-yawning-why-we-yawn-contagious_n_3398301.html

Jun 10, 2013 ... We all do it, and we all know it has at least something to do with how tired we feel . ... about yawning can trigger one (did we get you yet?)

Why Do I Yawn? - KidsHealth

kidshealth.org/en/kids/yawn.html

If you yawn in class, you'll probably notice a few other people will start yawning, too. Why is that?

Excessive Yawning and What You Can Do About It - Healthline

www.healthline.com/health/yawning-excessive

Feb 29, 2016 ... Excessive yawning is yawning that occurs frequently, sometimes without any apparent reason. Learn about possible causes and treatments for ...

Why do we yawn? Nothing to do with boredom - we're just cooling ...

www.independent.co.uk/news/science/why-do-we-yawn-nothing-to-do-with-boredom-were-just-cooling-our-brains-say-scientists-9356468.html

May 12, 2014 ... A new study has suggested that the reason we yawn has nothing to do ... thanks to the yawning and your newly-cooled brain, you're probably ...

What makes us yawn? | HowStuffWorks

science.howstuffworks.com/life/inside-the-mind/human-brain/question572.htm

Don't misunderstand, we aren't intending to bore you, but just reading about yawning will make you do it, just as seeing or hearing someone else yawn makes  ...

8 reasons for excessive yawning you probably didn't know about ...

www.thehealthsite.com/diseases-conditions/reasons-for-excessive-yawning-p915/

Sep 6, 2015 ... Fatigue or drowsiness: When you are tired or sleepy, it is common to yawn. While the exact mechanism of why we do this is yet unknown, ...

Why Do We Yawn and Why Is It Contagious? | Science | Smithsonian

www.smithsonianmag.com/science-nature/why-do-we-yawn-and-why-is-it-contagious-3749674/

Jun 28, 2013 ... Cats and dogs do it. Even human babies do it inside the womb. And maybe after seeing the picture above, you're doing it now: yawning.

Why Do We Yawn - Why What How of Human Body - Pediatric Oncall

www.pediatriconcall.com/kidscorner/whywhat/Why_yawn.aspx

Kids Corner - Read About Why Do We Yawn On Pediatric Oncall. ... Normally, when you breathe in, you inhale oxygen and your body uses it up. The body ...