endocardium的复数形式为：endocardia...

The endocardium is smooth, beneath which can be seen a red - brown myocardium.光滑的心内膜下面是红棕色的心肌.In 2 patients scar was intramural or epicardial with extension to the endocardium.2位患者的瘢痕从心室壁或者心外膜延伸到心内膜....

n.心内膜...

endocardium的音标：endocardium的英式发音音标为：[ˌendəʊ'kɑ:dɪəm]endocardium的美式发音音标为：[ˌendoʊ'kɑdɪrm]...