In humans, the heart is approximately the size of a closed fist and is located between the lungs, in the middle compartment of the chest, called the mediastinum. [4]

5 days ago · Heart, organ that serves as a pump to circulate the blood. It may be as simple as a straight tube, as in spiders and annelid worms, or as complex as the four-chambered double pump that is the …

3 days ago · Learn more about the American Heart Association's efforts to reduce death caused by heart disease and stroke. Also learn about cardiovascular conditions, ECC and CPR, donating, heart …

Your heart is the main organ of your cardiovascular system, a network of blood vessels that pumps blood throughout your body.

See the world from above with high-resolution satellite imagery, explore 3D terrain and buildings in hundreds of cities, and dive into streets and neighborhoods with Street View's 360° perspectives.

Aug 22, 2024 · 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.

Mar 24, 2022 · This image shows the four chambers of the heart and the direction that blood flows through the heart. Oxygen-poor blood, shown in blue-purple, flows into the heart and is pumped out …

Dec 14, 2025 · The heart is an organ, about the size of a fist. The heart is made of muscle and pumps blood through the body. Blood is carried through the body in blood vessels called arteries and veins. …

Heart keeps cardiologists up to date with important research advances in cardiovascular disease and also provides key educational resources

Jun 27, 2025 · In just 60 seconds, the average adult heart pumps about 1.5 gallons (5.7 liters) of blood. X-rays of ancient Egyptian mummies show that people had heart disease more than 3,000 years ago.