The book The Respiratory Circulation Theory: A Review of Its Principles and History by Emma Willard is a study of an important aspect of physiology. In this book you will find an analysis and overview of the key principles related to the process of circulation through breathing. Starting with the historical aspects of this theory and ending with modern studies, the author reveals in detail the essence of the phenomenon and its significance for the concept of the functioning of the body. This book is not only a source of knowledge for specialists in the field of medicine and biology, but also invites the reader into the exciting world of scientific discoveries and research.