Basic sciences, such as veterinary physiology, serve as the foundation upon which a veterinary graduate student builds their understanding of the veterinary sciences. This knowledge is crucial for understanding pathophysiology, animal productivity, and treatment strategies. The book covers practical aspects of the circulatory, digestive, respiratory, excretory, endocrine, and reproductive systems, as well as animal behavior and environmental physiology. The text is written in simple language, with physiological reference values and interpretation, to help undergraduate students better understand the basic principles of physiology that pertain to the health of domestic animals and birds.