why there is three openings at the top of human heart
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one is of Pulmonary Vein from where Oxiginated blood comes in, one is of Aorta from which Oxiginated blood is transported to other parts of body and one is for Upper vena cava for Enterence of Deoxiginated blood
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The Layers of the Heart Wall
The heart wall is composed of connective tissue, endothelium, and cardiac muscle. It is the cardiac muscle that enables the heart to contract and allows for the synchronization of the heartbeat. The heart wall is divided into three layers: epicardium, myocardium, and endocardium.
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