Explanation

• In the smooth glistening internal layer of the heart in which blood flow is called the Endocardium
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• The inner layer of the Heart wall is called Endocardium.
• The endocardium is a thin, smooth tissue that makes up the lining of the chambers and valves of the heart.
• The innermost layer of the heart's walls, it serves as a barrier between cardiac muscles and the bloodstream and contains necessary blood vessels