Through multi-trial experiments, students are able to see and measure something that is otherwise invisible to them- seeing plants transpire. This information will allow students to consider how a plant's unique characteristics (leaf...

Breathing Earth layers data about rates of carbon dioxide emission along with birth and death rates onto a map of the world in a real-time simulation of one of the principal greenhouse gases in the Earth's atmosphere, CO2.

[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.

In the following lessons for k-5 students are introduced to the structures within the human respiratory system.

[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...

This site features a detailed index of photographs for cardiovascular pathology. You can see what a normal human heart looks like and what a sick one looks like too. Come and check it out.