Life: Biological principles and the science of zoology -- The origin and chemistry of life -- Cells as units of life -- Cellular metabolism -- Genetics: a review -- Organic evolution -- Thr reproductive process -- Principles of development -- Architectural pattern of an animal -- Classification and phylogeny of animals -- Protozoan groups -- Mesozoa and parazoa -- Radiate animals -- Acoelomate bilateral animals -- Pseudocoelomate animals -- Molluses -- Segmented worms -- Anthropods -- Aquatic mandibulates -- Terrestrial mandibulates -- Smaller protostome phyla -- Echinoderms and hemichordates -- Chordates -- Fishes -- Early tetrapods and modern amphibians -- Amniote origins and reptilian groups -- Birds -- Mammals -- Support, protection, and movement -- Homeostasis: Osmotic regulation, excretion, and temperature regulation -- Internal fluids and respiration -- Digestion and nutrition -- Nervous coordination: Nervous system and sense organs -- Chemical coordination: Endocrine system -- Immunity -- Animal behavior -- The biosphere and animal distribution -- Animal ecology

1. Zoology