What Is Yawning?

Question by Barry C: What is yawning?
I know it’s opening your mouth, going ahhh, when your tired.
But what is the need for it ? (Scientifically)
because i swear when i yawn i hear things louder afterwards, like my ears have become unclogged lol

Best answer:

Answer by Alice Cullen
It’s a quick way for your body to get oxygen when it is lacking, well, oxygen.

Answer by leslie b
you know that