1. Homeostasis: the central concept in physiology -- 2. Neurons and nervous systems -- 3. Receptors and effectors -- 4. Endocrine function -- 5. Ventilation and gas exchange -- 6. Thermoregulation in animals -- 7. Circulatory systems -- 8. Gastrointestinal function -- 9. Osmoregulation -- 10. Excretory mechanisms -- 11. Reproduction ; Appendix: An outline classification of animals ; Glossary
