Presents information on the origins of life in the universe, focusing in on the human body, and discussing how its cells work together to operate the body's many systems.
Explains how the body defends itself against disease, including the roles of bacteria, viruses, and other germs, and the cells that work to protect the body against them.
Explains how cells fight off diseases and viruses in the human body. Includes specific examples of the defenders, like neutrophil, lymphocyte, and macrophage.