Biology 2e is designed to cover the scope and sequence requirements of a typical two-semester biology course for science majors. The text provides comprehensive coverage of foundational research and core biology concepts through an evolutionary lens. Biology includes rich features that engage students in scientific inquiry, highlight careers in the biological sciences, and offer everyday applications. The book also includes various types of practice and homework questions that help students understand—and apply—key concepts. The 2nd edition has been revised to incorporate clearer, more current, and more dynamic explanations, while maintaining the same organization as the first edition. Art and illustrations have been substantially improved, and the textbook features additional assessments and related resources.

By the end of this section, you will be able to do the following:

Describe epithelial tissues
Discuss the different types of connective tissues in animals
Describe three types of muscle tissues
Describe nervous tissue

By the end of this section, you will be able to do the following:

Describe the passage of air from the outside environment to the lungs
Explain how the lungs are protected from particulate matter

A two-part tutorial illustrating the structure and growth of bones, followed by a description of the cartilage model. [8:27]

Students use wood, wax paper and oil to investigate the importance of lubrication between materials and to understand the concept of friction. Using wax paper and oil placed between pieces of wood, the function of lubricants between materials is illustrated. Students extend their understanding of friction to bones and joints in the skeletal system and become aware of what engineers can do to help reduce friction in the human body as well as in machines.

NOVA provides a unique look into the world of sharks. Explore the "World of Sharks" for a species list, the Shark-O-Matic, diagrams, vivid descriptions of close encounters and shark attacks, and more.

This lesson goes over the parts of the human respiratory system and the gas exchange process that occurs in the lungs. It also covers changes in the respiratory system that occur during spaceflight, such as decreased lung capacity.