This program compares and contrasts animal nervous and endocrine systems, explains stimulus feedback mechanisms, and places coordination and control in a cellular context with explanations of what happens in signal transduction pathways.

This film illustrates the specialized structure and function of the four basic animal tissue types, describes 12 major bodily systems, and analyzes the process of homeostasis for both endotherms (regulators) and ectotherms (conformers). A concise history of zoology and species classification is also included, and the distinction between vertebrates and invertebrates is explained.

Rabies, Lyme disease, West Nile virus—all are examples of zoonosis, an infection that can be transmitted to humans from animals. In this program, several experts discuss major zoonotic diseases of concern and outline safety tips for both people and pets.