Briefly discuss the layers, chambers, valves, vasculature, and
the conduction system of the heart
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Medical Sciences
Briefly discuss the layers, chambers, valves, vasculature, andthe conduction system of the heart
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The wall of the heart is composed of three layers 1 The pericardium also called pericardial sac is a doublewalled sac containing the heart and the roots of the great vessels The pericardial sac has two layers a serous layer and a fibrous layer It encloses the pericardial cavity which contains pericardial fluid 2 The middle and thickest layer is the myocardium made largely of cardiac muscle cells It is the contraction of the myocardium that pumps blood through the heart and into the major arteries 3 Endocardium lines the chambers where the blood circulates and covers the heart valves It is made of simple squamous epithelium called endothelium Chambers of heart The human heart consists of four
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