The branch of life sciences that explores the structure of living organisms and their anatomical components is anatomy. Animal physiology is the study of how the structure and function of animals keep them alive and influence their responses to the environment.  Drawing from embryology, comparative anatomy, evolutionary biology, phylogeny, it aims to examine, analyze, and comprehend the structural organization of living entities. Animal anatomy specifically focuses on studying the anatomical structure of animals, encompassing topics such as vertebrate anatomy, arthropod anatomy, and animal tissues. This book provides comprehensive insights into the fundamentals of anatomy and physiology. Different approaches, evaluations and concepts related to this field have been included herein. Through this book, we attempt to further enlighten the readers about the new concepts in this field.