Why do people yawn even when they are asleep?!

Question: Why do people yawn even when they are asleep.?

i don't know y.? can u tell me.?Health Question & Answer

Answers:

What does yawning have to do with sleep.? Yawning is a reflex when the body wants more air than it's getting.Health Question & Answer

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Why do people yawn even when they are asleep?!

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