What are the three layers of the heart from superficial to deep?

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What are the three layers of the heart from superficial to deep?

From outside to inside, the heart wall has three layers: the epicardium, the myocardium, and the endocardium. The outermost layer, the epicardium, is the visceral layer of the serous pericardium and provides a smooth, protective surface with a small amount of connective tissue and fat. The middle layer, the myocardium, is the thick muscular tissue that generates the heart’s contractions; it contains cardiomyocytes arranged in a way that enables the heart to pump efficiently, with the ventricles being the thickest. The innermost layer, the endocardium, lines the chambers and covers the heart valves; it’s a thin endothelial surface that helps create a smooth flow of blood and reduces friction.

From outside to inside, the heart wall has three layers: the epicardium, the myocardium, and the endocardium. The outermost layer, the epicardium, is the visceral layer of the serous pericardium and provides a smooth, protective surface with a small amount of connective tissue and fat. The middle layer, the myocardium, is the thick muscular tissue that generates the heart’s contractions; it contains cardiomyocytes arranged in a way that enables the heart to pump efficiently, with the ventricles being the thickest. The innermost layer, the endocardium, lines the chambers and covers the heart valves; it’s a thin endothelial surface that helps create a smooth flow of blood and reduces friction.

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