Describe the difference between the endocardium myocardium and pericardium

Endocardium: is the innermost layer of the heart.

Myocardium: is the muscle layer

Pericardium: is a double-wall sac that cointains the heart.

Explanation:

While the Pericardium protects the heart against infection, provides lubrication and fixes it to the mediastinum, the Myocardium is the middle layer  from the heart and the thickest one. It has specialized muscle fibers that carry electrical impulses to the ventricles. It is the muscle layer comprised of cardiomyocytes. The endocardium is comprised of two layers: the inner one is made of endothelial cells and the second one is a subendocardial connective tissue where branches of the heart's conduction system are inmersed.

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