Science, asked by Kavya20, 1 year ago

why do you think we yawn when we are sleepy?

Answers

Answered by yashusri
5
paraventricular nucleus (PVN) of the hypothalamus of the braincan induce yawning.
Kavya20: Yashusri thanks!!
yashusri: welcome
Answered by Deadshot15
6
When we are sleeping or when we are bored, we yawn, because we breathe in less air than normal in these conditions. This is why we breathe in more air for more oxygen for our blood.
Kavya20: Deadshot15 thanks!!!
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