This program examines how the human immune system defends the body against disease-causing invaders-and how in some cases its antigen-fighting capabilities can be turned against the bodily cells it protects. Topics include the elements of the immune system, passive barrier defenses and nonspecific reactive responses, the humoral immune response and its associated antibodies, and the process of cell-mediated immunity. The program also addresses the importance of vaccines, the mechanics of allergies and autoimmune diseases, and advances in the field of immunology.

Encoded with permission for digital streaming by Infobase on Aug. 20, 2009. Learn360 is distributed by Infobase for Films for the Humanities & Sciences, Cambridge Educational, Meridian Education, and Shopware.

Innate Immunity & Defenses (3:42) -- Immune System: White Blood Cells (1:54) -- Body Organs and Immune System (2:06) -- Humoral Immune Response (3:31) -- Cell Mediated Immunity (3:49) -- Importance of Vaccines (2:00) -- Allergies & Autoimmune Diseases (3:36).