Psychology, asked by kayalvizhirajkumar20, 1 year ago

why do we yawn ?............​

Answers

Answered by khushikumari7674
1

Answer:

Yawning is a mostly involuntary process of opening the mouth and breathing in deeply, filling the lungs with air. It's a very natural response to being tired. In fact, yawning is usually triggered by sleepiness or fatigue. ... Certain conditions can cause a vasovagal reaction, which results in excessive yawning........

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