Why are some people lactose intolerant? What happens to the brain during and after a concussion? What causes acne breakouts? The answers to these questions and many more are found in the biology of the human body. Featuring relatable scenarios and hands-on activities, this book details how biology affects practically everything in a person's everyday life. Sidebars consider myths about acne, sex testing in sports, antibiotic resistance, mental health, and how microorganisms transform food. Supporting Next Generation Science Standards in Middle School Life Science, this book provides students with a deeper understanding of the process of science and the importance of biology in their lives.