1. Chordate Characters 2. Kinds of Vertebrates (Classification) 3. The Distribution of Animals in Space (Chronology and Ecology) 4. The Distribution of Animals in Time (Palaeontology) 5. Man in the Making (Anthropology) 6. Units of Structure (Cytology) 7. Division of Labor in Tissues (Histology) 8. The Development of the Individual (Embryology) 9. Biological Discords (Pathology) 10. A Jack of All Trades (The Integument) 11. Intake Apparatus (Digestive System) 12. Internal Transportation (Circulatory System) 13. The Release of Energy (Respiratory System) 14. Outgo Apparatus (Excretory System) 15. The Preservation of Species (Reproductive System) 16. Involuntary Regulation (Glands of Internal Secretion) 17. The Skeleton 18. Production of Motion and Locomotion (Muscles) 19. The Dominating Factor (Nervous System) 20. Ports of Entry (Sense Organs)