There are rich microvilli on the surface of epithelial cells in the epicardium. 心外膜表面的上皮細胞有豐富的微絨毛。
Having no pattern in the cardiac muscles,their distribution was often found in the myocardial layers,and occassionally under the epicardium. 在心肌內(nèi)分布無規(guī)律，多見于心肌層，也偶見于心外膜下。