heart muscle 短语 心肌 词形变化 heart muscles 复数 释义与例句 n. 1. Synonym of cardiac muscle. 词汇关系 名词 同义词 1 cardiac muscle 上位词 1 muscle 下位词 8 pacemaker atrioventricular bundle bundle of His myocardium papillary muscle Purkinje fiber S-A node sinoatrial node 整体词 3 heart pump ticker