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①目的进一步了解动物心肌细胞的种属特性。②方法应用电子显微镜对鲤、蟾蜍、鳖和家鸽等几种脊椎动物心肌细胞进行了观察。③结果这几种动物心肌细胞的侧面连接较多见。除家鸽外，心肌细胞的肌原纤维的排列比较松散。所观察各种属动物的心肌细胞均含有单位膜包绕的特殊颗粒，以心房肌细胞为多，但这几种动物心肌细胞的特殊颗粒在大小、形态、分布等方面均有明显差异。家鸽心肌细胞的特殊颗粒小，常成群分布于肌膜下方，并可见颗粒外排迹象。其它种属的特殊颗粒大小不等，多位于核周区。横小管系统以家鸽心室肌最易辨认，其它均少见。家鸽心肌细胞中的肌原纤维较其它动物密集，且排列整齐。④结论脊椎动物心肌细胞的超微结构有种属特性。
① Objective To further understand the species characteristics of animal cardiomyocytes. ② Methods Electron microscopy was used to observe the cardiomyocytes of several vertebrates such as carp, toad, turtle and domestic pigeon. ③ the results of these animal cardiomyocytes side connections more common. In addition to domestic pigeons, cardiomyocytes myofibrils arranged more loosely. Myocardial cells observed in all kinds of animals contain special granules surrounded by unit membranes, which are mostly atrial myocytes. However, there are significant differences in the size, shape, distribution and other aspects of the special particles of these kinds of animal cardiomyocytes. Pigeon cardiomyocytes of the special particles are small, often grouped in the muscle below the membrane, and visible signs of exosomes. Other species of special particles ranging in size, mostly in the perinuclear zone. Horizontal tube system to pigeon ventricular muscle most easily identified, others are rare. The myofibrils in pigeon cardiomyocytes are densely arranged and neatly arranged than other animals. ④ Conclusion The ultrastructure of vertebrate cardiomyocytes has the characteristics of species.