Heart & Circulation; Diagram of the Human Circulatory System (Infographic) Infographics. ... The system of blood vessels in the human body measure about 60,000 miles (96,560 kilometers).

Map of the Human Heart Let's get straight to the heart of the matter—the heart's job is to move blood. Day and night, the muscles of your heart contract and relax to pump blood throughout your body.

Learn about the anatomy of the heart and how its chambers, valves, and vessels work together to maintain effective blood circulation throughout the body to sustain life.

The heart is the hardest-working muscle. It pumps out 2 ounces (57 grams) of blood with every heartbeat. Daily, the heart pumps at least 2,500 gallons (9,464 liters) of blood.