Anatomy & Physiology for Dogs & Cats - Nutrition affects all 10 systems of an animal’s body. Your online pet nutrition training includes anatomy and physiology concepts in order to help you better understand how your holistic nutritional interventions affect an animal’s health. Your A&P course does not have to be done all at once like our other courses. A&P book chapters can be done and submitted one at a time throughout your training. This helps the student to avoid boredom and to continue learning what they really like.