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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, 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 . . . Help us create a healthier world free of heart disease and stroke Since the American Heart Association’s founding in 1924, deaths from cardiovascular diseases have been cut in half And yet, there are still so many lives to be saved
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
How the Heart Works | Congenital Heart Defects (CHDs) | CDC Blood is carried through the body in blood vessels called arteries and veins The process of moving blood through the body is called circulation Together, the heart and vessels make up the cardiovascular system The heart has four chambers (two atria and two ventricles)
Heart Anatomy: Labeled Diagram and Quick Reference The anatomy of the human heart starts with understanding each of the four chambers Learn about the upper, lower, right, and left parts of heart anatomy