Students examine the role of the immune system in the human body. They conduct a hand-washing experiment, answer questions while viewing videos, discuss key vocabulary, draw and label illustrations, and observe demonstrations and record...

Students explore the hidden world of microbes and how our bodies spring into action in response to diseases. This ten lesson unit presents data on several microbial diseases and the reaction of the body's immune system.

An interactive, self-guided lesson on pathogens and microorganisms. This lesson has many descriptive animations as well as diagrams to help with understanding. There is a self-checking quiz at the end of the lesson.

[Free Registration/Login may be required to access all resource tools.] In the following tutorial you will learn about the barriers that keep most pathogens out of the human body.