The heart is the body's hardest-working muscle. Whether you're awake or asleep, or exercising or resting, your heart is always at work. It pumps blood through arteries to deliver oxygen to organs and ...

Heart attacks remain one of the leading causes of death worldwide, affecting people of all ages and backgrounds. While medical advances have improved survival rates, knowing key facts about heart ...

Your heart works nonstop—about 100,000 beats a day. Here are 4 surprising facts you probably didn’t know about it. The heart beats 100,000 times daily, pumping 2,000 gallons of blood. Broken heart ...

Originally appeared on the NOVA Web site Cut to the Heart. Sure, you know how to steal hearts, win hearts, and break hearts. But how much do you really know about your heart and how it works? Read on ...

The heart is one of the most incredible and hardworking organs inside your body. It pumps about 70 millilitres (two ounces) of blood with each beat, and does this over three billion times in the ...

The sinoatrial (SA) node is the natural pacemaker of the heart. It generates electrical impulses that cause the heart’s chambers to contract, setting the heart rate. The SA node typically generates 60 ...

Sure, you know how to steal hearts, win hearts, and break hearts. But how much do you really know about your heart and how it works? Read on to your heart's content! Put your hand on your heart. Did ...