This fully updated edition of a key title in anaesthesia provides essential knowledge for candidates preparing for the primary and final FRCA examinations, particularly in understanding the basic sciences behind anaesthetic practice. It focuses on helping candidates clearly explain these principles, especially during the viva section of the exams. The book includes all critical graphs, definitions, and equations that may appear in the examinations, alongside concise explanations of how to present them to the examiner and why they are significant. With precise, well-structured diagrams, key definitions, derivations, and statistics, this guide serves as an indispensable study aid for FRCA candidates, ensuring they are well-prepared for the challenges of both written and oral examinations.