Why do we yawn?

  • Yawning
  • Reflexes
  • Oxygen levels
  • Contagious yawning
Why do we yawn? zoom_in

Yawning is a reflex that helps regulate the body's oxygen and carbon dioxide levels. It can also be triggered by boredom or fatigue. The exact cause of contagious yawning is still unknown.

Sources & Related Links

en.wikipedia.org/wiki/Yawn medicalnewstoday.com/articles/319631 healthline.com/health/why-do-we-yawn#causes
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