Question

Why do we yarn when we feel Sleepy or drowsy???❓❓❓❓❓❔❓❔❓❔❓❔❓❓❓❓❓❓❔❔❓❓❓❓❓❓❓❓❓❓❔❔❓❓❔❓❓❓❓❓❔❓❓❓❓❓❓❓❓❓❓❓❓❓❓❓❓❓❓❓❓❓❓❓❓❓❔❓❔❕❕❔❕❓❓❓❓❔​

Answer 1

Answer:

Because our brain cells lack sufficient amount of oxygen.

hope it's help you

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Answer 2

Answer:

We yawn because the brain cells lack sufficient amount of oxygen.we also feel so much tired!

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