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The cardiac muscle pattern is elegant and complex. The middle layer (of 3 layers) of the heart wall is the myocardium, is the cardiac muscle. The muscle cells swirl and spiral around the chambers of the heart

The cardiac muscle pattern is elegant and complex.
The middle layer (of 3 layers) of the heart wall is the myocardium, is the cardiac muscle. The muscle cells swirl and spiral around the chambers of the heart