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.
Updated at 11:17 p.m. EDT. Los Angeles County coroner's spokesman Craig Harvey says determining the cause of Michael Jackson's death will require further neuropathology and pulmonary tests that will take four to six weeks. Harvey says there were no signs of foul play or trauma to the body during the three-hour autopsy.