When someone is tired, he or she yawns to increase the oxygen content in the blood. The blood is then carried to the brain which increases alertness or in other words wakes you up.
Fun Fact! All animals can yawn!
When sleepy or tired, you yawn to increase the oxygen content in the blood. The blood is then carried to the brain for increased alertness.
When I am sleepy or tired I yawn.
because your tired
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.
Same thing as when you yawn..... When you get tired you get a shortness of breath causing you to yawn...you yawn to catch your breath when your tired...
People yawn because they are bore.....right now,their is no approved causal of yawnimg
When I am sleepy or tired I yawn.
Yes when they are sleepy and tired
because your tired
because stomach aches usually make you tired by the pain so when your tired you usually yawn! does that helP?
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.
because we feel tired
Same thing as when you yawn..... When you get tired you get a shortness of breath causing you to yawn...you yawn to catch your breath when your tired...
A yawn is normally a response to a change in activity, although if you did not get enough sleep, you could become tired and yawn.
People yawn because they are bore.....right now,their is no approved causal of yawnimg
yes when you are tired and your body is trying to stay awake it yawns
Same as humans because there tired
no it means you have rectal disfunction