Gotoh T
Acta Anat (Basel). 1983;115(2):168-77. doi: 10.1159/000145687.
Ultrastructural differentiation of cardiac muscle cells in the bilateral atria and ventricles of the cat at 1, 16, 25 and 40 days and 6 months after birth was studied by morphometry on electron micrographs. At the newborn stage, no T-tubule was found in the ventricular muscle cells, but specific granules were already noted in the atrial myocytes. The cell diameter of the ventricular myocardium was greater than that of the atrium at this stage. The T-tubule was first recognized in the ventricular muscle cells at day 16, at which stage the area occupied by the mitochondria and glycogen in the atrial muscle cells was definitely found to differ from that in the ventricular muscle cells. Thereafter, the differences in the ultrastructure between the atria and ventricles became more remarkable, particularly in the cell diameter and in the mitochondrial area. The cat cardiac muscle cells are characterized by numerous lipid droplets within the cytoplasm in contrast to those of the rat and the guinea pig.
通过对电子显微镜照片进行形态测量，研究了出生后1天、16天、25天、40天及6个月时猫双侧心房和心室心肌细胞的超微结构分化。在新生阶段，心室肌细胞中未发现T小管，但心房肌细胞中已观察到特定颗粒。此时心室心肌细胞的直径大于心房。在第16天时，首次在心室肌细胞中识别出T小管，在此阶段，明确发现心房肌细胞中线粒体和糖原所占面积与心室肌细胞不同。此后，心房和心室之间的超微结构差异变得更加明显，尤其是在细胞直径和线粒体面积方面。与大鼠和豚鼠的心肌细胞相比，猫的心肌细胞特征是细胞质内有大量脂滴。
