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.
Questions swirl about Jackson and medication. LOS ANGELES, California (CNN) -- Questions swirled Friday about the possible role prescription medications may have played in the death Thursday of pop idol Michael Jackson, people close to him said. The cause of pop star Michael Jackson's death has not been determined after Friday's autopsy. His autopsy was completed, but further tests must be carried out before the cause of death can be determined, a spokesman for the Los Angeles County Coroner said.