图示：正常心肌纵切面 可以看到细胞核和平等排列的心肌纤维，心肌纤维间的线形粉红色条纹为闰盘。
This is the normal appearance of myocardial fibers in longitudinal section. Note the central nuclei and the syncytial arrangement of the fibers, some of which have pale pink intercalated disks
