The myocardium of the heart is the muscular component of the wall that is thicker within the ventricles than the atria. It is continuous with the tunica media of the adjoining blood vessels. Deep, it is continuous with the connective tissue of the endocardium of the heart. More superficially, it is continuous with the epicardial layer.
The myocardium can be divided into two key types of cell:
Both sets of cells are suspended in a matrix of fine connective tissue. They are associated closely with a ramifying network of capillaries.
Last reviewed 01/2018