Question

How we yawn? Why we yawn? Answer me Yawn leads us sleep or Sleep leads us yawn..???

Correct one marked as brainiest i promise...guys

Answer 1

we yawn when we r tired or bored.

When we r tired, our lungs need more oxygen so we yawn

If u see someone yawning,  you can automatically yawn

One is that when we are bored or tired, we just don't breathe as deeply as we usually do. As this theory goes, 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.