Introduction to Animals
Animal Evolution and Diversity
Animal Systems I
Animal Systems II
Animal Behavior
Unity and Diversity of Life
Evolution
Structure and Function
“Studies of animal structure and function show how evolutionary change has produced life's diversity. In each animal group, various ‘body-part tool kits' have adapted and changed over time to form structures typical to each group. Those structures perform essential functions, most of which help—directly or indirectly—to maintain homeostasis. The body-part tool kits are shaped by genetics whose shared elements can be traced back over time and throughout the animal kingdom.”