What Is the Immune System?

Explores the human immune system. This book begins with a narrative of the immune system in action before explaining how it works, what can happen when it does not work properly, and how to keep it strong. Vivid images and a helpful diagram will aid in comprehension. Additional features include a table of contents, sidebars, critical thinking questions, Fast Facts, an activity for further learning, a phonetic glossary, an index, an introduction to the author, and sources for further research.