- Heart - Wikipedia
[8] The heart pumps blood with a rhythm determined by a group of pacemaker cells in the sinoatrial node These generate an electric current that causes the heart to contract, traveling through the atrioventricular node and along the conduction system of the heart
- Heart | Structure, Function, Diagram, Anatomy, Facts | Britannica
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 center of the circulatory system in humans, other mammals, and birds
- Heart: Anatomy Function - Cleveland Clinic
Your heart is the main organ of your cardiovascular system, a network of blood vessels that pumps blood throughout your body
- How the Heart Works - What the Heart Looks Like | NHLBI, NIH
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 to the lungs
- The human heart - Heart Research Institute
Find out more about the human heart – the main organ of your circulatory system – and its essential role in the body
- Heart Anatomy, Function, and Blood Circulation - WebMD
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
- American Heart Association | To be a relentless force for a world of . . .
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 disease information for healthcare professionals, caregivers, and educators and healthy living
- Heart disease - Symptoms and causes - Mayo Clinic
Learn about symptoms, causes and treatment of cardiovascular disease, a term describing a wide range of conditions that can affect the heart
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