Our goal in preparing the seventh edition of Zoology, as in previous editions, was to prepare an introductory general zoology textbook that we believe is manageable in size and adaptable to a variety of course formats. We have retained the friendly, informative writing style that has attracted instructors and students to previous editions. Part One - Biological Principles, Part Two - Animal-Like Protists and Animalia, Part Three - Form and Function: A Comparative Perspective; Glossary, Credits, & Index