My kids and i were wondering why do we yawn???

Answer 1

Well, I'm not a doctor but my old science teacher told me it was because your brain/body needs more oxygen, and it helps clean your eyes because when you yawn your eyes water, which helps clean them.

Answer 2

Yawning is the bodys response to lack of oxygen because of lack of activity. That is, as you're bored your breath becomes more shallow, and as a result less oxygen gets into the bloodstream. The body then yawns resulting in a few deep breaths which immediately oxygenates the blood, increases the adrenaline slightly and you become somewhat more aware.

Answer 3

Its caused by a lack of oxygen to the brain.

Answer 4

I was always told because your body needs the extra oxygen at that time.

Answer 5

Hi,friend
Sorry to bother you .
I have a store on yahoo.we main sell chinese Antique,Jewellery ,pearl;name brand watch,MP3,MP4,kinds of Memory ;Nike,adidas ,Polo , more name brand clothes and kinds of Musical Instruments and so on .if you have free time ,i hope you can click my store .if you interesting in purchase ,i hope you don't miss this choice ,We are sincere serve for you,if you like our store ,i hope you can tell your friend .my store link is www.llpshop168.com ,i am a new yahoo user ,i hope you can give the precious suggestion for me .
our service msn is [e-mail] ,[e-mail]
my yahoo message is [e-mail]
ICQ:357779734
Best wishes for you and your family
llpshop168

Answer 6

your brain needs more oxygen or blood flow

Answer 7

TO REMIND YOURSELFS TO BRUSH THOSE MOLARS! NO, I HEARD IT WAS TO GET EXTRA OXYGEN THE BODY MIGHT NEED. THAT MAY BE WHY WE FEEL TIRED.