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.
The bedroom where Michael Jackson died in 2009 was a mess â littered with bedcovers, oxygen tanks, prescription pill bottles and other medical supplies, photos newly released by the Los Angeles Police Department show. The King of Pop died on June 25, 2009, at age 50 â with lethal levels of drugs in his system.