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.
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
People yawn because they are bore.....right now,their is no approved causal of yawnimg
because your tired
People don't just yawn because they're sick, first of all, they're brain sends out a message to the body, and then the body reacts as a yawn. You also yawn when you're tired, or need to lie down.
Dogs may yawn in response to their owner's yawning as a form of social communication or empathy, rather than as a direct mimicry behavior. It can be a way for them to bond with their owner or show that they are tuned into their owner's emotions.
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
Insects do not yawn. People necessarily do not yawn only when they are tired. Most people, after reading this, will yawn.
Yawn doesn't have a TM number because it isn't a TM.
because your mind is not concentrated so you yawn to show you to go to bed
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.
because your tired
People yawn because the body reacks to oragans and air gets traped
People yawn because they are bore.....right now,their is no approved causal of yawnimg
because we feel tired
you cant close you jaw when you yawn because it is trying to stretch like when we have sex
Giraffes are grouchy because they cannot yawn. And maybe they have soar necks. They really do not yawn though.
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.