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You do not yawn when you are relaxed because scientists have proven that when you yawn, you either need sleep or it is because you are tired.

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13y ago

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WHY WE YAWN?

When we are sleepy or drowsy then our lungs don't take enough oxygen which increases carbon dioxide in our body. The brain senses this and sends us a messages that causes us to yawn. By Akhilesh Sharma


Can you give a sentence for the word yawn?

Insects do not yawn. People necessarily do not yawn only when they are tired. Most people, after reading this, will yawn.


What TM number is Yawn?

Yawn doesn't have a TM number because it isn't a TM.


Why we yawn when we are sleepy?

because your mind is not concentrated so you yawn to show you to go to bed


What does it mean when there is an aggressive yawn from a guinea pig?

When a guinea pig is yawning its a sign of aggression but it's also a sign that a guinea pig is relaxed and happy, so it can be confusing. If the yawning is followed by teeth chattering, it's probably an aggressive yawn, if it's followed by a stretch, it's probably good and it means your guinea pig is happy and relaxed. Even if it is an aggressive yawn, as long as there is no other signs of aggression, he probably is just trying to show the other one who is boss.


Why do you yawn when you are not sleepy?

because your tired


Why do peopel yawn?

People yawn because the body reacks to oragans and air gets traped


Why do you 'yawn' when tired?

People yawn because they are bore.....right now,their is no approved causal of yawnimg


Why do you stretch after you yawn?

because we feel tired


Why you cannot close your jaw when you yawn?

you cant close you jaw when you yawn because it is trying to stretch like when we have sex


Why do giraffes get grouchy?

Giraffes are grouchy because they cannot yawn. And maybe they have soar necks. They really do not yawn though.


Why is yawning involuntary because you can't control your yawn?

No one knows why we yawn. It isn't just boredom or sleepiness. It can be associated with some diseases such as MS. Even unborn infants yawn.