part_of part of part of develops from attached to Homo sapiens multi-tissue structure heart epicardium TODO - check links with UBERON:0002425 visceral serous pericardium. develops from proepicardium. WP:Epicardium -- When considered as a part of the pericardium, it is the inner layer, or visceral pericardium, continuous with the serous layer. The visceral pericardium apparently produces the pericardial fluid, which lubricates motion between the inner and outer layers of the pericardium. During ventricular contraction, the wave of depolarization moves from endocardial to epicardial surface. [Wikipedia:Epicardium] myocardium visceral serous pericardium mesoderm-derived structure proepicardium