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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.
Nákup knihy
Why is Yawning Contagious?, Francesca Gould
- Jazyk
- Rok vydania
- 2007
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- Titul
- Why is Yawning Contagious?
- Jazyk
- anglicky
- Autori
- Francesca Gould
- Vydavateľ
- Piatkus Books
- Rok vydania
- 2007
- Väzba
- mäkká
- Počet strán
- 228
- ISBN10
- 0749951583
- ISBN13
- 9780749951580
- Série
- Prečo?
- Štítky
- Náučná literatúra, Veda
- Hodnotenie
- 3,3 z 5
- Anotácia
- 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.