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Why do we yawn when we …

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Why do we yawn when we are sleepy or drowsy?

    • Posted by Madhavi Bhange 7 years ago

    CBSE > Class 07 > Science
    • 1 answers

    Y.S. Poojitha 7 years ago

    When we are feeling drowsy or sleepy we are yarning because oxygen supply to our brain is less during drowsy or sleepy, so through yarning we are taking more oxygen.

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