Responsible for changing the way thousands of people think about cardiovascular health, this time-tested Health Edco classic magnifies the differences between a healthy artery and one that is clogged with sticky yellow plaque. Flip the display over and watch as blood cells zip through the clean artery in a couple of seconds, while those in the atherosclerotic artery sluggishly wind their way through a jagged maze of cholesterol build-up and stop-capturing the exact moment a heart attack occurs.