This book presents, for students of physical education and physical therapy, the essential facts of human anatomy and physiology as they pertain to the subject of corrective exercise. There is nothing original in the text except its arrangement and the emphasis placed on certain phases of the subject. The material has been gathered from medical literature and from clinical experience. The purpose of this little book is twofold. First, it aims to convince the student of health and physical education that one of his greatest concerns should be to help children and young people build efficient and beautiful bodies. Second, it aims to furnish the student with some basic, fundamental facts and principles on which to build a sound program of reconstructive health and physical education.