1 / 9

Yawning: What is it and why is it contagious (if it is)?

Yawning: What is it and why is it contagious (if it is)?. Priya Patel 6We-15. Yawning. A yawn is a reflex of inhalation and exhalation It draws more oxygen into the bloodstream. Reasons for yawning. Some reasons we yawn are: Tiredness Boredom Stress Overworking Emotions

cwen
Download Presentation

Yawning: What is it and why is it contagious (if it is)?

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Yawning: What is it and why is it contagious (if it is)? Priya Patel 6We-15

  2. Yawning • A yawn is a reflex of inhalation and exhalation • It draws more oxygen into the bloodstream

  3. Reasons for yawning • Some reasons we yawn are: • Tiredness • Boredom • Stress • Overworking • Emotions • Awakening hunger

  4. Physical needs for yawning • These are some hypotheses for physical reasons of yawning: • When our blood needs more oxygen • To regulate body temperature • Chemicals in our brain that affect moods and emotions could cause us to yawn

  5. Other animals that yawn • Dogs • Cats • Adelie penguins • Emperor penguins • birds

  6. Is yawning contagious? • Nobody really knows of yawning contagious • Some people just think it’s a way of synchronizing behavior

  7. Superstitions about yawning • A person must cover his/her mouth when they yawn or else your soul will escape • Yawning is a sign that danger is near • Counting a person's teeth while they are yawning robs them of one year of life for every tooth counted • A yawn may be a sign that one is afflicted by the evil eye • Frequent yawning by a woman indicates she is likely to be committing adultery, which results in a lack of sleep

  8. Fun Facts • Reading about yawning makes you yawn • 40-60% of people who see a picture (or video) of someone yawning will yawn themselves • Yawns become contagious to people between the first and second years of life. • When one person in a group yawns over half of the people will yawn within five minutes, and the rest will at least be tempted to yawn. • The average duration of a yawn is about 6 seconds. • Yawns in male students had a longer duration than those in female students.

  9. Bibliography • http://wikipedia.com • http://www.howstuffworks.com/question572.htm • http://www.chevroncars.com/learn/wondrous-world/yawn-contagious • www.cuddlecats.info/images/funnycat1.jpg • http://wiki.answers.com • http://thefuntimesguide.com/2006/08/yawningandyawns.php

More Related