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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 | 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
  • 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
  • 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)
  • 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 Health - Harvard Health
    The heart beats about 2 5 billion times over the average lifetime, pushing millions of gallons of blood to every part of the body This steady flow carries with it oxygen, fuel, hormones, other compounds, and a host of essential cells





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