The pericardium is a double-walled sac that contains the heart and the roots of the great vessels. The outer wall of the pericardium is composed of dense connective tissue. The portion of the inner wall of the pericardium that is in contact with the heart (but not in contact with the great vessels) is the epicardium. The epicardium contains the blood vessels supplying blood to heart muscle (the coronary arteries) as well as nerve fibers.
It's been three years since the world learned of Michael Jackson's death. Photos: Remembering the King of Pop Three Years Later.
Share 0 Tweet 0 Share 0 Share Email Print Share. Even though the shock of the King of Pop's death is still fresh, news reports are beginning to emerge as to what caused the cardiac arrest that ended Michael Jackson's life at just 50 years old.