It isn't because you are tired, it is because your blood lacks oxygen. When you've been idle too long and suddenly move, you can find yourself yawning later on. That's why a person yawns after waking up in the morning. Yawning adds oxygen to the blood. If it bothers you, try deep breathing.
We yawn because We yawn because we need to get rid of CO2, so that would mean if you don't yawn you will eventually die from hypercapnia (too much CO2)!
They yawn for the same reason that you do, too much carbon dioxide in the body. Yawning is the body's was of releasing the excess gases.
Pass gas, Talk too much, Burp, Kiss, Swear, Yawn
You will pass out. You will yawn. You may feel very sleepy.
Sorry? Could you at least specify your answer? -BTW- I can yawn actually. I'm sure you can too.
They probably just woke up. People yawn when they wake up too.
because your sleepy too.
ur at a baseball game and you turn around in your seat and yawn. Pretty soon other people start to yawn too.
Yawning is the body's tendency to get oxygen as fast as possible if your breathing does not supply your body enough. If you yawn too much, it means you are not getting enough oxygen through inhaling. Better consult a doctor for that. (:
No, its just when carbon dioxide is too much and goes to your brain, you'll become dizzy.....oxygen and carbon dioxide must be balance.... you will yawn if you need oxygen in your brain...XD
we yawns o much because of lack of oxygen in our bodies. If you are sititng in class for example, and you yawn, its not becasue you are tired, it is becasue you donthave much oxygen in your body . :)