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More model informationThe heart is a muscular organ that pumps blood throughout the body. It is about the size of a fist and is located in the center of the chest, slightly to the left. The heart has four chambers: two atria and two ventricles. The atria are the upper chambers and the ventricles are the lower chambers. The heart’s job is to pump blood to the lungs and to all of the body’s tissues.
The heart is made up of three layers of tissue: the pericardium, the myocardium, and the endocardium. The pericardium is a thin, serous membrane that surrounds the heart. The myocardium is the thickest layer of tissue and is made up of muscle. The endocardium is a thin, smooth layer of tissue that lines the inside of the heart.
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Jun 19th 2023
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