Why do we yawn while we feel sleepy?

When we are tired our body needs some rest which actually means our body needs more oxygen to over come the fatigue feeling. We yawn to intake more oxygen but it is a temporary settlement. To overcome tired ness our body needs sleep.

  • 9

because when we are drowsy we breathing rate goes down..Thus ,there is a lack Oxygen in our body..as per needed .so by yawning we take a deep breath to fullfill the need of oxygen....!!

Hope my answer help you.

  • 6
What are you looking for?