Respuesta :
If you are talking about the pericardium sac it is a 2 layered fluid filled sac that surrounds the heart to protect it
Answer:
a sac around the heart that protects the heart and chest tissues
Explanation:
Pericardium
Pericardium: the protective saclike membrane enclosing the heart and its vessels
Gives protection
Reduces friction
Limits movement
Is found externally