Why Is Yawning Contagious pdf epub mobi txt 电子书下载 2024

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Francesca Gould

Portrait; illustrated edition edition (25 Oct 2007)

2007

228

$ 14.28

19.4 x 13 x 2 cm

9780749951580

图书标签: 科普

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发表于2024-09-21

Why Is Yawning Contagious epub 下载 mobi 下载 pdf 下载 txt 电子书下载 2024

Why Is Yawning Contagious pdf epub mobi txt 电子书下载 2024

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 下载 mobi epub pdf txt 电子书

著者简介

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.