As the title suggests, this book is a comprehensive textbook on the subject of physiology. Written by Edward Albert Sharpey-Schäfer, a Scottish physiologist who made significant contributions to the field, it covers everything from the structure and function of cells to the workings of the nervous and endocrine systems. This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work is in the "public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.