University of Wisconsin
The Why Files: Salt and Blood Pressure
The Why Files have provided information regarding the pros and cons of salt in relation to blood pressure.
Other
National Stroke Association: What Is Stroke?
An article from National Stroke Association about what a stroke is. Symptoms, types, and myths are offered as well.
CK-12 Foundation
Ck 12: Fourth Grade Science: Life Science: The Cardiovascular System
[Free Registration/Login may be required to access all resource tools.] Discusses the parts and functions of the cardiovascular system.
Bill Nye
Bill Nye: Go With the Flow
Try this at-home science experiment to learn about the flow of blood.