Heart-attack deaths have fallen 60 percent in four decades. Still, millions of Americans suffer from cardiovascular diseases linked with heart attacks and strokes.

Knowing what causes heart disease and how you can prevent it can help you live a healthier, longer life.

Answer this one: Why is lack of regular exercise a major risk factor for heart disease?

Don’t feel guilty about snacking! Eating small, frequent meals can help you control your weight and stay fueled throughout the day. Just make sure your snacks—and those you serve your kids—are nutritious.

Answer this one: Which ethnic food offers healthy, low-fat choices?

The main symptom of emphysema is shortness of breath, which is caused by permanent damage to the small air sacs and small airways in the lungs.

True or false: An interaction between alcohol and a medicine can lead to extreme drowsiness and other effects. Do you know the answer to this and other questions about medicine interaction?

Your doctor can't give you the best care if you don't say what's really going on. This true-false quiz will help you prepare for your next visit.

Take this quiz to find out how to decrease your risk of developing diabetes.

More than 18 million Americans have been diagnosed with diabetes and more than 5 million more have diabetes but don't realize it, according to the CDC. Yet diabetes is the sixth leading cause of death in the United States.