Or do they just go hand in hand?
2006-09-10 10:14:51 · 4 answers · asked by ♥ 2 in Science & Mathematics ➔ Other - Science
Yawning is caused by lack of Oxygen. Next time you need to yawn, try breathing deeply for a while. Usually when we are tired, we breathe shallow, causing the yawn.
2006-09-10 10:21:15 · answer #1 · answered by Anonymous · 0⤊ 0⤋
Yawning is caused by lack of oxygen. That's it. That is why you feel tired, because your body is lacking proper intake of oxygen.
2006-09-10 17:29:30 · answer #2 · answered by opsaop 2 · 1⤊ 0⤋
I have heard that yawning is a way of relaxing the body
2006-09-10 17:22:22 · answer #3 · answered by lidakamo 4 · 0⤊ 1⤋
How would you measure tired? One theory is that yawning alerts us to the fact that we are tired, so we can prepare a safe place to sleep.
2006-09-10 17:18:50 · answer #4 · answered by rscanner 6 · 0⤊ 1⤋