Why is Yawning Contagious?: Everything You Ever Wanted to Know About the Human Body and Some Things (BOK)

Francesca Gould

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Everything you ever wanted to know about the human body - and some things you'd rather not...A wonderfully entertaining yet authoritative treasure trove of facts about our anatomy - it answers all the questions about our bodies we're usually too embarrassed to ask.* Why is yawning contagious? Some experts think that yawning may have developed as a means of communication. It may, for example, be a way of signalling to others that it's important to remain alert and stay awake in a certain situation. Another theory is that our early ancestors used it as part of their social behaviour, and as a way to help build a bond with the rest of the group.* Why are bogies green? When white blood cells meet germs, they make a large amount of an enzyme called myeloperoxidase, which is green because it contains a lot of iron. The colouration therefore comes from the iron.

Produktfakta

Språk Engelsk Engelsk Innbinding Heftet
Utgitt 2007 Forfatter Francesca Gould
Forlag
PIATKUS BOOKS
ISBN 9780749951580
Antall sider 240 Dimensjoner 12,7cm x 19,5cm x 1,5cm
Vekt 225 gram Leverandør Bertram Trading Ltd
Emner og form Popular medicine & health