What are the reasons for the high performance of the heart?

The heart is largely composed of muscle tissue, it is this tissue that provides contractions. The thickest layer is the myocardium. The heart is able to beat so often because the largest number of mitochondria produce energy for work, in comparison with the rest of the body. It does not do without a sufficient amount of oxygen for work; therefore, the heart is surrounded by a dense network of blood vessels.



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