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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
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
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 Normal Heart Works | Childrens Hospital of Philadelphia How the Normal Heart Works The heart is a large muscular organ with the very important job of circulating blood through the blood vessels to the body Located in the center of the chest, the heart is the hardest working muscle in the human body — always working, even while we are sleeping The heart and blood vessels together make up the body's cardiovascular system and are vital to