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.
For other people named Michael Jackson, see Michael Jackson (disambiguation). Michael Joseph Jackson (August 29, 1958 â June 25, 2009) was an American singer, songwriter, record producer, dancer, actor, and philanthropist. Called the King of Pop, his contributions to music, dance, and fashion along with his publicized personal life made him a global figure in popular culture for over four decades.