DK 
Why Is Blood Red? 

Explore the intriguing answers to more than 200 questions about the human body in DK“s newest biology encyclopedia for kids.
What does the heart do? What are bones made of? Why do your ears pop? This children“s ebook, ideal for ages 6-9, will help inquisitive minds find out the answers to all the questions they may have about their bodies, and some they hadn“t thought of! Covering amazing organs, stupendous senses, and the perplexing ways our bodies work, Why? Human Body helps children get to grips with the gigantic topic that is human biology. Each page asks a new question that kids might have about the human body, before answering it, and features a quick quiz testing children“s knowledge of what they have just read. Bursting with mind-boggling details and fascinating facts, this visually stunning ebook is something that every young scientist will want to own.