Deck 18: Pericardium and Heart Flashcards | Quizlet
Deck 18: Pericardium and Heart. STUDY. PLAY. What is the Adult Pericardium sac? A double-walled membrane or sac that completely encloses the heart and roots of great vessels. It lies at the level of the T5-T8 vertebra posterior to the body of the sternum.