Can any one tell. One of my Dr.friend told that our brain needs oxygen. When It is reduced our brain cells are getting tired. To avoid this tiredness lungs will start acting more and we are getting yawning.
A group of people who are doing the same work continuously are getting tired and all will yawning.
But we assume that If the opposite person is yawning means we also get yawn.
I donot know but now I am yawning after seeing this kid. Bye
Even I used to wonder why we yawn. May be your doctor friend's explanation must be right
ReplyDeleteyes Ranjana Thanks for your visit and valuable comment
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