The<unk>  is the most superficial layer of the pericardium.  It is a dense connective tissue, protecting the heart, anchoring it to the surrounding walls, and preventing it from overfilling with blood. It is continuous with the outer adventitial layer of the neighboring great blood vessels.
Fibrous pericardium
Serous pericardium
Epicardial fat pad
Epicardium
Chordae tendineae
Tunica intima
Endocardium
Interatrial septum