The inner surfaces of the heart’s chambers are lined with a thin sheet of shiny, white tissue known as the endocardium. The same type of tissue, more broadly referred to as endothelium, also lines the body’s blood vessels, forming one continuous lining throughout the circulatory system. This lining helps blood flow smoothly and prevents blood clots from forming inside the circulatory system.

What is the endocardium?

 The endocardium is the inner layer of the heart. It consists of epithelial tissue and connective tissue. Function:

 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.