Why Is Yawning Contagious 2024 pdf epub mobi 电子书

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Francesca Gould is a lecturer in anatomy and physiology, and has written a number of books on holistic therapy. She runs a training school in Bristol and teaches many courses.

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Why Is Yawning Contagious 2024 pdf epub mobi 电子书

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出版者:Portrait; illustrated edition edition (25 Oct 2007)

作者:Francesca Gould

出品人:

页数:228

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出版时间:2007

价格:$ 14.28

装帧:19.4 x 13 x 2 cm

isbn号码:9780749951580

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图书标签: 科普

Why Is Yawning Contagious 2024 pdf epub mobi 电子书图书描述

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.

Why Is Yawning Contagious 2024 pdf epub mobi 电子书

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