| The circulatory system | Walker, Pam, 1958- | 2003 | 612.1 WAL |
| Discusses the organs and function of the human circulatory system, the vital functions of blood, and the medical diagnosis and treatment of heart disease and other circulatory disorders. |
| The digestive system | Walker, Pam, 1958- | 2003 | 612.3 WAL |
| Discusses the organs and fuction of the human digestive system, nutrients essential for good health and how they are processed by the body, and medical treatments of digestive disorders. |
| The endocrine system | Walker, Pam, 1958- | 2003 | 612.4 WAL |
| Presents information on how the endocrine system works within the human body and highlights various diseases and disorders of the endocrine system. |
| The brain and nervous system | Walker, Pam, 1958- | 2003 | 612.8 WAL |
| Discusses the structures, functions, and mysterious operations of the brain and nervous system. |
| The immune system | Walker, Pam, 1958- | 2003 | 616.07 WAL |
| Describes the structure and function of the immune system and also discusses allergies, autoimmune diseases, and vaccines. |