Human Biology, Sixth Edition, provides students with a clear and concise introduction to the general concepts of mammalian biology and human structure and function. With its unique focus on health and homeostasis, Human Biology enhances students' understanding of their own health needs and presents the scientific background necessary for students to think critically about biological information they encounter in the media. The completely revised content and exceptional new art and photos provide students with a more user-friendly text, while excellent learning tools maximize comprehension of material. Table of Contents Part 1. From Molecules to Humankind 1. Life in the Balance: Human Health, Homeostasis, Evolution, Science, and Critical Thinking 2. The Chemistry of Life 3. The Life of the Cell Part 2. Structure and Function of the Human Body 4. Principles of Structure and Function 5. Nutrition and Digestion 6. The Circulatory System 7. The Blood 8. The Vital Exchange: Respiration 9. The Urinary System: Ridding the Body of Wastes and Maintaining Homeostasis 10. The Nervous System 11. The Senses 12. The Skeleton and Muscles 13. The Endocrine System Part 3. Immunity and Infectious Diseases 14. The Immune System 15. Human Infectious Disease Part 4. Heredity and Reproduction 16. Chromosomes, Cell Division, and the Cell Cycle 17. Principles of Human Heredity 18. How Genes Work and How Genes are Controlled 19. Genetic Engineering and Biotechnology 20. Canc