Knowledge of the functions of the organism under normal conditions is necessary for understanding the mechanisms that govern diseases and effectiveness in clinical practice. The 5th edition of Veterinary Physiology approaches this broad subject in a practical and user-friendly manner, making the relationship between basic principles and clinical practice understandable. From cell physiology to the functioning of the body systems, homeostasis, and the functioning of the immune system, this comprehensive guide provides the necessary foundations for providing effective veterinary care.