I used this book for a Physiology class. The book was absolutely terrible. I used my anatomy book all the time and I felt it was very straightforward. This book, however, was not. It is choppy and difficult to understand. I will admit that the lab book that went with it was more helpful than the textbook, both both were lacking. It also speaks to the professor and the book that the book was hardly mentioned and the professor used her own explanations and did not supplement with book material. Total waste of money.