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Heart - Wikipedia 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]
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