Your heart starts beating before you are born and keeps right on going through your whole life. Over an average lifetime, the human heart beats more than 2.5 billion times. Keeping your heart healthy means eating right, not smoking, and...

In July 2001, a major advancement in medical science was made. Find out about the first completely implanted artificial heart that totally replaced the function of the human heart. Read about what the AbioCor is and view a video on the...

In this activity, students squeeze a tennis ball to demonstrate the strength of the human heart. Working in teams, they think of ways to keep the heart beating if the natural mechanism were to fail. The goal of this activity is to get...

Everybody knows that your body needs oxygen to keep going, and that you breathe out carbon dioxide as waste. What happens when you exercise? You've probably noticed that you breathe faster, and your heart beats faster. What triggers your...

What do you know about the circulatory system? This site features several links to help you increase your knowledge of this fascinating human body system.

Understand the structure and function human cardiovascular system.