Modern technology offers more ways than ever to find and diagnose problems in the body. This series highlights several groundbreaking innovations and inventions, as well as the science behind them. Each book also features a “That’s Amazing!” special feature, informative sidebars, a table of contents, a reading comprehension quiz, a glossary, additional resources, and an index. This Focus Readers series is at the Navigator level, aligned to reading levels of grades 3-5 and interest levels of grades 4-7.