ANATOMY

Detailed explanation-1: -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.

Detailed explanation-2: -What is known is that the behavior is contagious. The likelihood of yawning increases sixfold, according to one study, after seeing someone else yawn. As for yawn contagion, Giordano said it may be related to a phenomenon called social mirroring, where organisms imitate the actions of others.

Detailed explanation-3: -Yawning is a mostly involuntary process of opening the mouth, breathing in deeply, and filling the lungs with air. While there’s no precise cause of yawning, it’s often viewed as a natural response to being tired. In fact, yawning is usually triggered by sleepiness or fatigue.

Detailed explanation-4: -Yawning is associated with some hormones that are released that briefly increase the heart rate and alertness. So actually the reason that one yawns when tired or bored is the body’s attempt to keep you alert and awake-if only for a brief time.