Why do People yawn???

Question

just wondering because when you're tired, you just have the feeling to yawn. why??? what does yawning help? it just makes you feel your tiredness even more.

Chynna

Answer 1

its because when weare tired, we tend to slump more, which gives us less air when we breathe, therefore we periodically take large breaths of air (yawns) to make up for this lack of breath

Answer 2

I think it is from lack of oxygen.

Answer 3

I dont exactly know but I know scientists can't prove why if we yawn someone else sees you yawn they yawn.

Answer 4

I don't know...because theyr'e tired