Why do you yawn?
Question:
Answers:
To increase oxygen levels in the body.
Because your oxygen saturation is dropping and you need to raise the level back up in your body.
your brain is certainly telling you something that you aren't getting enough sleep.
Its claimed to help increase the state of alertness of a person. It has been shown not to be from lack of oxygen, because it reduces oxygen intake compared to normal inspiration. Another speculated reason for yawning is nervousness - paratroopers were once noted yawning right before their first jump.[citation needed] The exact causes of yawning are still undetermined.
becuz ur tired.
(:
Because you are short of air.
This is not a definitive answer but I notice that I yawn when my eyes are dry like when I am tired or first thing in the morning when I wake up. Yawning seems to create tears which lubricate the eyes.
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