ANATOMY

 

HEART ANATOMY

Heart Walls

Epicardium - The epicardium is the outer layer of the wall of the heart. It is composed of connective tissue covered by epithelium. The epicardium is also known as the visceral pericardium.

Provides an outer protective layer for the heart.

Myocardium - Myocardium is the muscular middle layer of the wall of the heart. It is composed of spontaneously contracting cardiac muscle fibers which allow the heart to contract.

Stimulates heart contractions to pump blood from the ventricles and relaxes the heart to allow the artria to receive blood.

Endocardium - The endocardium is the inner layer of the heart. It consists of epithelial tissue and connective tissue.

Lines the inner cavities of the heart, covers heart valves and is continuous with the inner lining of blood vessels.

Purkinje fibers are located in the endocardium. They participate in the contraction of the heart muscle.

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