Korektoj

HELPU KOREKTI NUN!Korektita

Text from tomo2009 - English

  • Yawn

    • Why yawning is contagious to some creatures, i.e. human?
    • Some studies have proven against a common misconception that yawning has something to do with concentration of oxygen or carbon dioxide in the brain.
    • In fact people who need more oxygen in their brain may not yawn quite often.
  • The reason why we yawn is because we want to cool down the temperature of our brain by letting cooler air contact with blood vessel in our head.
    • An experiment shows that person with an ice bag on top of his head yawn less frequently.
  • This holds true for other animals.
    • An experiment shows that parakeet only yawn at certain range of temperature.
    • Unfortunately, yawning is not contagious for some animals like parakeet.
    • Contagious yawning in fact can be advantageous to some animals, which enhances the awareness among groups.
  • Further studies show that contagious yawning is linked to the sense of empathy (share the feeling).
    • For instance, social impaired children yawn less frequently when they see other yawning.
  • Yawning frequency can have different level: family> friend>people known>stranger.
  • Some other animals yawn for different purposes.
    • For example, monkey yawns to show its sharp teeth; penguin yawns to attract mates; snake yawns to make adjustment on its breathing.

PLEASE, HELP TO CORRECT EACH SENTENCE! - English