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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 . . . 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 disease - Symptoms and causes - Mayo Clinic Many forms of heart disease can be prevented or treated with healthy lifestyle choices Heart disease symptoms depend on the type of heart disease Coronary artery disease is a common heart condition that affects the major blood vessels that supply the heart muscle
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
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 heart: Anatomy, how it works, and more - Medical News Today The human heart is a finely-tuned instrument that serves the whole body It is a muscular organ around the size of a closed fist, and it sits in the chest, slightly to the left of center The
Biology of the Heart - Heart and Blood Vessel Disorders . . . The heart and blood vessels constitute the cardiovascular (circulatory) system The heart pumps blood to the lungs so the blood can pick up oxygen, and then pumps oxygen-rich blood to the body