Respiration is one of the processes that all living organisms have in common. As such it has to be one of the most important processes in biology; and one that it is always worthwhile to study and understand better. In this book I have explained the main principles of respiration and included an exam question and answer section with exam tips to help students. Often people who don't know chemistry well find respiration a difficult topic to grasp; so I have made the effort to explain the chemical terms used and make these easily understandable. Respiration is sure to come up on a Biology course; so I invite you to read this book to gain understanding of this fundamental topic. I am sure it will help you and I am very happy that it will do so.