Heart structure Compose of entirely muscle The wall of the heart: two thin layers of epithelial called myocardium Myocardium contraction pump the blood through circulatory system. Adult heart contract ~72 times a minute
Heart structure Compose of entirely muscle The wall of the heart: two thin layers of epithelial called myocardium Myocardium contraction pump the blood through circulatory system. Adult heart contract ~72 times a minute