WebMD
Web Md: Blood Pressure
This site from WebMD Health provides great information on blood pressure. The basic overview discusses what blood pressure is, shows a picture of it, gives a chart to mark it, and includes several links for additional information.
American Heart Association
American Heart Association: Getting Healthy: Nutrition Center: Sodium
Learn the importance of sodium in our daily diets as well as the negative effects of excess salt in a person's diet. Contains fact sheets, quizzes and slideshows.