Includes bibliographical references and index.

If you look at a piece of a leaf or a drop of saliva through a microscope, what do you see? Cells are the basic building blocks of life and they make up every living thing, from plants to animals, from humans to bacteria! In Cells: Experience Life at Its Tiniest, readers ages 12 to 15 investigate cells and learn how they affect our health, reproduction, criminal investigations, and agriculture.