http://www.nhlbi.nih.gov/health/dci/Diseases/anemia/anemia_whatis.html
National Heart, Lung, and Blood Institute, National Institutes of Health
This publication provides an overview and overlook of anemia (uh-NEE-me-eh). It is a condition in which your blood has a lower than normal number of red blood cells. The page links to additional information about anemia, including causes, signs and symptoms, diagnosis, treatments, and prevention.