Whether calculating your target heart rate, assessing your risk for a common condition, or testing your knowledge of today's health concerns, these tools help you manage your health. They are easy to use, informative, and often surprising.
The red blood cells in your body look like doughnuts. Their main job is to carry oxygen to body tissues and remove carbon dioxide. Anemia is a condition in which the body doesn’t have enough healthy red blood cells. Learn more about anemia by taking this quiz, based on information from the National Heart, Lung and Blood Institute (NHLBI).