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Structure of the Heart
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Fibrous pericardium Outermost layer
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Parietal pericardium inside lining of outer covering
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Pericardial cavity Space in between
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Epicardium (visceral pericardium)
Directly covering the heart
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Myocardium (cardiac muscle)
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Intercalated disc*
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Musculi pectinate
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Papillary muscle Muscle at the base of the chordae tendineae
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Chordae tendineae Heart strings
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Trabeculae carneae Fold of muscle in the ventricle
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Moderator band
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Endocardium Inner lining of the heart
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Ligamentum arteriosum
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Right Atrium
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Right auricle
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Superior vena cava
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Inferior vena cava
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Coronary sinus
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Interatrial septum
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Tricuspid valve
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Rt. ventricle
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Interventricular septum
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Pulmonary (semilunar) valve
Separates the right ventricle and the pulmonary artery
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Pulmonary trunk
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Pulmonary arteries (L & R )
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Left atrium
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Left auricle
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Pulmonary veins (R & L) – posterior view
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Mitral (bicuspid) valve
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Left ventricle
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Aortic (semilunar) Valve
Separates the left ventricle and the aorta Located behind the Mitral valve
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Aorta
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Systemic Circulation Supplies oxygenated blood to all of the tissues located throughout the body, with the exception of the heart and lungs.
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Cardiac circulation
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Left coronary artery (only seen if auricle is open)
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Circumflex artery
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Anterior interventricular artery
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Right coronary artery
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Marginal artery
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Posterior interventricular artery
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Great cardiac vein
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Middle cardiac vein
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