K-Gr 2—Each body system is introduced as part of a story featuring interactions between two children, with some situations more plausible than others. Jasmine's explanation of her school science project in My Lungs and Jack's account of his doctor visit to fix his broken leg in My Bones seem more likely than two classmates' discussion of muscle systems while they wait for a school nurse. Anatomical illustrations are clear, well labeled, and effectively placed, enhancing the narratives. Characters often appear stiff and unattractive, although there are humorous touches such as the blob people that Jack and Lissa mention when they wonder what humans would look like without bones. Each volume includes a final diagram of the entire featured system, plus statistics such as brain weight and spinal cord length. VERDICT Suitable additions for collections needing simple introductions to body systems.