H & E- The atrioventricular valve (d) joins at its base (c) to the cardiac skeleton. Endocardium (f), a coronary artery (a) and coronary vein (b) are also identified. Note the difference in thickness of the myocardium between the atrium and the ventricle.

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	Slide Text H & E- The atrioventricular valve (d) joins at its base (c) to the cardiac skeleton. Endocardium (f), a coronary artery (a) and coronary vein (b) are also identified. Note the difference in thickness of the myocardium between the atrium and the ventricle.