write about the internal structure of heart
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human heart is four chambered to prevent the mixing of carbon dioxide rich blood and oxygen rich blood the oxygenated blood is tech from pulmonary veins to left atrium of heart and deoxygenated blood is reach from pulmonary artery to right atrium below both the atrium ventricle is present which is known as left ventricle and right ventricle between left and right atrium ,left and right ventricle a partion is present which prevent the mixing of oxygenated and deoxygenated blood
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