This textbook covers the main topics required by GCSE syllabuses in human biology. It can also supplement GCSE biology courses and provide a basic reference for all students needing a grounding in human biology. Each unit is dealt with in a double-page spread with text on the left-hand page and diagrams on the right, allowing each topic to be easily assimilated. Simply-worded text with clear explanations of important technical terms, a detailed glossary, and vocabulary and comprehension tests reinforce understanding throughout the book.