Answer:
B. parietal pericardium
Explanation:
parietal pericardium -
The outer layer of pericardium , is made up of tissues , which surrounds the roots of the blood vessel and heart .
The pericardium has two coats , inner and outer coats .
The outer coat is thick and tough and is connected to the central part of the diaphragm . While the inner coat have two layers , one layer is close to the heart , while the other is present in the inner surface of the outer coat .
pericardial fluid , act as a lubricant to allow the normal heart movement .
