heart disease
Heart Disease The heart is an organ that pumps blood through all the veins in the body. ... The heart is about the same size as a human fist. ... The heart beats about 100,000 times a day, an adults resting heart rate is about 70 beats a minute. The heart will beat an average of 2. ... Heart disease is when something prevents the heart from working, as it should. As a result the heart cannot pump blood around your body as easy. It is the leading cause of death; it causes half the deaths in the United States and 270,000 heart attacks in the UK every year.