This volume investigates the fundamental principles of human physiology, aiming to provide a comprehensive understanding for medical students and practicing physicians. Howell's work, drawing on established medical knowledge of the era, presents a systematic exploration of bodily functions, integrating anatomical structures with their physiological roles. The text is structured to build a foundational knowledge base, progressing through various organ systems and their complex interrelationships.

This textbook is recognized as a foundational text in medical education, offering a detailed and systematic approach to understanding human physiology. Its comprehensive scope and clear explanations have made it a valuable resource for generations of medical students and physicians seeking to grasp the complexities of the human body. The work is noted for its rigorous scientific approach and its ability to connect theoretical knowledge with practical clinical application.