Immune system / Gatchel, Bob

Explains what causes infectious and noninfectious diseases; describes the functions of skin, mucus, the inflammatory response, and the lymphatic system in protecting the body from disease; talks to a doctor about white blood cells; and presents an experiment on hand washing.

Presents an introduction to the human immune system, explaining how the skin, white blood cells and antibodies work to ward off disease, sickness and other ailments, and includes a look at how the human body reacts to various environmental situations.