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.
Born Michael Joseph Jackson on Aug. 29, 1958, in Gary, Indiana. Died June 25, 2009 While Michael Jackson had a Top 5 album and No. 1 hit on his hands with his second solo album, 1972's Ben and its title track, it was 1979's chart-topper Don't Stop 'Til You Get Enough from his third album, Off The Wall, that cemented Jackson in the pop stratosphere.