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's music still on Top 10 charts five years after his death. Bodyguards reveal secrets of Jackson's last years in a new book. When we actually saw that he really does like girls, we were high-fiving, guard says. Trials reveal Jackson died in a desperate search for sleep during comeback effort.