Internal Anatomy Of The Heart

Right Ventricular Infundibulum

A cross section cut through the heart reveals three layers (Fig. 7) (1) a superficial visceral pericardium or epicardium (epi upon + heart) (2) a middle myocardium (myo muscle + heart) and (3) a deep lining called the endocardium (endo within, derived from the endoderm layer of the embryonic trilamina). The endocardium is a sheet of epithelium called endothelium that rests on a thin layer of connective tissue basement membrane. It lines the heart chambers and makes up the valves of the heart....