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Tissue in heart

Specify the tissue which the heart is made up? And also explain how this tissue is oxygenated and nutrified?

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The heart is made up of striated cardiac muscle tissue. The heart muscle is also known as the myocardium and it is oxygenated and nutrified by the coronary arteries. The coronary arteries originate from the base of the aorta and ramify round the heart penetrating the myocardium.

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