Myocardium vs. Pericardium — What's the Difference?

The muscular tissue of the heart.

The pericardium, also called pericardial sac, is a double-walled sac containing the heart and the roots of the great vessels. It has two layers, an outer layer made of strong connective tissue (fibrous pericardium), and an inner layer made of serous membrane (serous pericardium).

The muscular substance of the heart; the middle of the three layers forming the outer wall of the human heart.

The membranous sac filled with serous fluid that encloses the heart and the roots of the aorta and other large blood vessels.

The main substance of the muscular wall of the heart inclosed between the epicardium and endocardium.

A serous membrane that surrounds the heart allowing it to contract.

The middle muscular layer of the heart wall

The double baglike fold of serous membrane which incloses the heart.

A double-layered serous membrane that surrounds the heart