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A double-walled sac called the ______ encases the heart, which serves to protect the heart and anchor it inside the chest. vena cava pericardium aorta septum
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A double-walled sac called the ______ encases the heart, which serves to protect the heart and anchor it inside the chest. vena cava pericardium aorta septum

User RaySF
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Pericardium is a double walled sac enclosing the heart.
User Medoingthings
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