Organisms need to be able to maintain nearly constant internal environments in order to survive, grow and function effectively and efficiently. By maintaining homeostasis, humans remain healthy, strong and protected from the invasion of foreign organisms, such as viruses, bacteria and fungi. This practical pocket guide covers: - the anatomy and physiology of cardiovascular system vital signs - recognition of common arrhythmias and important skills for cardiovascular health cannulation and venepuncture - the anatomy and physiology of the respiratory system - skills related to addressing respiratory problems. This competency-based text covers relevant key concepts, anatomy and physiology, lifespan matters, assessment and nursing skills. To support your learning, it also includes learning outcomes, concept map summaries, activities, questions and scenarios with sample answers and critical reflection thinking points. Quick and easy to reference, this short, clinically-focused guide is ideal for use on placements or for revision. It is suitable for pre-registration nurses, students on the nursing associate programme and newly qualified nurses.