There are rich microvilli on the surface of epithelial cells in the epicardium. 心外膜表面的上皮细胞有丰富的微绒毛。
epicardium epicardia
[ noun ] the innermost of the two layers of the pericardium <noun.body>
Epicardium \Ep`i*car"di*um\, n. [NL., fr. Gr. 'epi` upon + kardi`a heart.] (Anat.) That part of the pericardium which forms the outer surface of the heart; the cardiac pericardium.