Antibodies
Information on antibodies and their classes.

The Anatomy of the Immune System
In depth look at the immune system and all its separate parts, including organs and cells.

How Stuff Works: Immune System
Describes the immune system and discusses related topics such as allergies and AIDS.

The Immune Response: The Body's Natural Defense
A look at the immune system's role in cancer. Includes graphics.

Cells of the Immune System
Descriptions and pictures of the cells involved in the immune response.

Understanding the Immune System
From the National Institutes of Health, a detailed look at the enemies that the immune system fights, the way the immune system recognizes foreign objects, the lymphatic system, antibodies, cells, allergies, autoimmune disorders, HIV, cancer, and technologies currently being studied.

Bioproject.info - Immune System
Components and disorders of this body system, including an overview of the two types of immunity.