I do not know how did this young woman, but she has a tone of writing and a way of explaining humorous and clarity that make the journey hilarious mouth-anus and super super informative! What is learned things about the functioning of our body !!! Please note this is not a book for those seeking solutions to medical problems. It is a book that explains how things work. This may not sound very interesting but in fact for people who have a medical condition that indicates paths to follow. By reading this book you will learn that you are a little world all by yourself and you will never look the same eye bacteria !! a great read that I recommend very very warm !! this book reads almost like a novel and is within reach of everyone !! go ahead read !!