Covers a deeper explanation of life science as it pertains to the biology of the human body. Concise, easy-to-understand explanations are reinforced by colorful illustrations/diagrams and straightforward tables. Topics include genetics and DNA, as well as these human body systems: ?Circulatory ?Digestive ?Endocrine ?Immune & Lymphatic ?Integumentary ?Muscular ?Nervous ?Reproductive ?Respiratory ?Skeletal ?Urinary