Thursday, February 12, 2009


The endocardium is the innermost layer of tissue that lines the chambers of the heart and heart valves. The endocardium is thicker in the atria than in the ventricles. Its cells, embryologically and biologically, are similar to the endothelial cells that line blood vessels.

The endocardium consists of a layer of endothelial cells and an underlying layer of connective tissue.