what how why human body

What How Why Human Body

This book in the What, How, Why series explores various aspects of the human body, through the question-and-answer format.

The human body is an extraordinary machine. It allows us to breathe, feed, run, think, interact with others...and much, much more! Every small part of our body is a true microcosm. But what are our organs made of? Why does the heart beat?