yes because its saying to go to bed!
When you yawn it doesn't mean your sleepy. Even scientists don't know why you yawn.
while sleepy CO2 accumulation increase and to get rid of it we yawn.
When I am sleepy or tired I 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 tired
When you yawn it doesn't mean your sleepy. Even scientists don't know why you yawn.
while sleepy CO2 accumulation increase and to get rid of it we yawn.
When I am sleepy or tired I 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.
Yes when they are sleepy and tired
because your tired
because your mind is not concentrated so you yawn to show you to go to bed
because your mind is not concentrated so you yawn to show you to go to bed
When two people yawn at the same time means one is sleepy. The other is just copying the other.
yawn and say I'm getting sleepy are you tired
Sleep (I mean like, do they yawn or whine or curl their tail around their paws or something.)
because your sleepy too.