Medical Definition of Yawn

Reviewed on 3/29/2021

Yawn: Involuntary opening of the mouth, accompanied by slowly breathing inward and then outward. Repeated yawning can be a sign of drowsiness, boredom, or depression. The yawn helps to open tiny air sacs (alveoli) in the lungs that can collapse during shallow breathing.

CONTINUE SCROLLING OR CLICK HERE

QUESTION

What causes tooth decay? See Answer

Health Solutions From Our Sponsors