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.
Michael Jackson: five years on from his death, how does his reputation stand? Five years on from the death of Michael Jackson, his legacy and alleged rivalry with Prince seems more potent than ever, says Bernadette McNulty. Michael Jackson in concert in Milton Keynes, Britain Photo: REX FEATURES.