because your mind is not concentrated so you yawn to show you to go to bed
When I am sleepy or tired I yawn.
Yes when they are sleepy and tired
because your tired
yawn and say I'm getting sleepy are you tired
When you yawn it doesn't mean your sleepy. Even scientists don't know why you yawn.
You yawn when you are sleepy because that is when you take in the least oxygen. Your body takes in more oxygen when you are yawning, which explains the reason to why you take in air when you yawn.
because your sleepy too.
yes because its saying to go to bed!
while sleepy CO2 accumulation increase and to get rid of it we yawn.
You only tend to yawn when you're very sleepy or when your listening/watching something very boring that you're not interested in. You can't really choose when to yawn.
When two people yawn at the same time means one is sleepy. The other is just copying the other.
Yawning when we are sleepy helps increase oxygen intake and regulate brain temperature. It is also believed to be a way for our body to stay alert and maintain arousal levels during times of fatigue or boredom.