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.
Conrad Murray, Michael Jackson's doctor, released from prison after two years. Conrad Murray was sentenced to four years in prison for involuntary manslaughter in Michael Jackson's death, but only served two because of overcrowding in California's prison. The doctor convicted of killing Michael Jackson walked out of jail a minute after midnight Monday â and went straight for a fast-food meal. Conrad Murray, 60, slipped out a back exit undetected by dozens of journalists and die-hard Jackson fans outside the county lockup in downtown Los Angeles.