The space between the parietal layer and visceral layer of the pericardium contains serous fluid. It is a tissue of the hearth.
The pericardium is one of the three tissues that form the hearth, which also includes the myocardium and epicardium.
The pericardium forms a highly fibrous structure that is capable of holding heart tissues and blood vessels.
Pericardial fluid is composed of a serous liquid that is produced by the pericardium and released into the pericardial cavity.
Learn more about pericardium here:
https://brainly.com/question/1224295
