From the moment it begins beating until the moment it stops, the human heart works tirelessly. In an average lifetime, the heart beats more than two and a half billion times, without ever pausing to rest. Like a pumping machine, the heart provides the power needed for life.

This life-sustaining power has, throughout time, caused an air of mystery to surround the heart. Modern technology has removed much of the mystery, but there is still an air of fascination and curiosity.

Explore the heart. Discover the complexities of its development and structure. Follow the blood through the blood vessels. Wander through the weblike body systems. Learn how to have a healthy heart and how to monitor your heart’s health. Look back at the history of heart science.

Soon, your fascination and curiosity may lead to understanding and respect.