Drugs interact with the brain to alter moods, emotions, and behaviors by changing the brain's chemistry, perceptions, and interactions. The final lesson in the Pharmacology unit shows scholars experiments, has them complete four labs,...

[Free Registration/Login may be required to access all resource tools.] In the following online lesson students will explain how the rate of breathing is regulated.

Learn everything you've ever wanted to know about your heart and lungs as you journey through this human gallery. Animations, videos, lessons and links to new technologies are included.

[Free Registration/Login may be required to access all resource tools.] Describes how the rate of breathing is regulated and controlled.

When you breathe, you transport oxygen to the body's cells to keep them working, while also clearing your system of the carbon dioxide that this work generates. How do we accomplish this crucial and complex task without even thinking...

[Free Registration/Login may be required to access all resource tools.] The World Health Organization (WHO) reports that 2.4 million people die each year from causes directly related to air pollution. Worldwide, there are more deaths...