Question

why do we human beings yawn?​

Answer 1

Answer:

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. Stretching and yawning may be a way to flex muscles and joints, increase heart rate, and feel more awake.

Answer 2

Answer:

Human beings yawn when they are bored or tired.

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Hope it helps you!!

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