Comprehensive, contemporary, and engaging, Animal Physiology provides evolutionary and ecological context to help students make connections across all levels of physiological scale. One of the major challenges instructors and students face in Animal Physiology is making connections across levels of biological scale. Animal Physiology addresses this challenge by providing ecological and evolutionary context to the study of physiology at all levels of organization: genome, molecular biology, biochemistry, cells, tissues, organs, and organ systems. Hill's inclusion of ecology and evolution helps readers gain a holistic perspective on animal function and sets Animal Physiology apart from texts that focus more narrowly on physiology. Hill's Animal Physiology is trusted by instructors and students because of its authoritative, current, engaging, and lavishly illustrated presentation.