Question

Why do we yawn? What's the need of yawing? Is it necessary?

Answer 1

Answer:

One is that when we are bored or tired, we just don't breathe as deeply as we usually do. As this theory goes, our bodies take in less oxygen because our breathing has slowed. Therefore, yawning helps us bring more oxygen into the blood and move more carbon dioxide out of the blood.

Answer 2

Answer:

we yawn because at that moment our brain needs oxygen supply to get more oxygen we yawn

Explanation:

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