Part One · Introduction to the Living Animal

Chapter 1 Life: Biological Principles and the Science of Zoology

Chapter 2 The Origin and Chemistry of Life

Chapter 3 Cells as Units of Life

Chapter 4 Cellular Metabolism

Part Two · Continuity and Evolution of Animal Life

Chapter 5 Principles of Genetics: A Review

Chapter 6 Organic Evolution

Chapter 7 The Reproductive Process

Chapter 8 Principles of Development

Part Three · The Diversity of Animal Life

Chapter 9 Architectural Pattern of an Animal

Chapter 10 Classification and Phylogeny of Animals

Chapter 11 Protozoan Groups

Chapter 12 Mesozoa and Parazoa

Chapter 13 Radiate Animals

Chapter 14 Acoelomate Animals

Chapter 15 Pseudocoelomate Animals

Chapter 16 Molluscs

Chapter 17 Segmented Worms

Chapter 18 Arthropods

Chapter 19 Aquatic Mandibulates

Chapter 20 Terrestrial Mandibulates

Chapter 21 Lesser Protostomes

Chapter 22 Lophophorate Animals

Chapter 23 Echinoderms

Chapter 24 Chaetognaths and Hemichordates

Chapter 25 Chordates

Chapter 26 Fishes

Chapter 27 Early Tetrapods and Modern Amphibians

Chapter 28 Reptilian Groups

Chapter 29 Birds

Chapter 30 Mammals

Part Four · Activity of Life

Chapter 31 Support, Protection, and Movement

Chapter 32 Homeostasis

Chapter 33 Internal Fluids

Chapter 34 Digestion and Nutrition

Chapter 35 Nervous Coordination

Chapter 36 Chemical Coordination

Chapter 37 Immunity

Chapter 38 Animal Behavior

Part Five · The Animal and Its Environment

Chapter 39 The Biosphere and Animal Distribution

Chapter 40 Animal Ecology