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.
Video: Michael Jackson's weird and wonderful life. The legend of Wacko Jacko from baby dangling to crotch grabbing. Michael Jackson's body is loaded into a van to be taken to the Los Angeles County Coroner's office Photo: REUTERS. Singer Michael Jackson dies in Los Angeles aged 50 Photo: BBC.