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狗心脏假腱索传导细胞内部结构及其在心动周期中的适应性形态变化的光镜和电镜观察表明:传导细胞于心脏收缩期发生明显弯曲,形成波浪状外观,当心脏舒张时,传导细胞伸展,弯曲程度明显减轻。在透射电镜下,假腱索内传导细胞肌原纤维含量不等,排列不规则,根据肌原纤维含量及其排列方式,可将传导细胞分为三类:类浦肯野细胞,类普通心肌细胞及移行细胞。收缩及舒张状态下肌原纤维 A 带均靠近 Z 线,I 带不明显,提示传导细胞在心动周期中无明显收缩活动。
The light microscope and electron microscope observation of the internal structure of conduction curve of dog’s false chain tendon and its adaptive morphological changes during cardiac cycle showed that the conductive cells were obviously bent during systole and formed wavy appearance. When the heart was dilated, the conductive cells Stretching, bending significantly reduced. Under the transmission electron microscope, the content of myofibrillar cells in the tendons was irregular and arranged irregularly. According to the contents of myofibrils and their arrangement, the conductive cells could be divided into three groups: Purkinje cells, Cells and transitional cells. Systolic and diastolic conditions, myofibrillar A band are close to the Z line, I was not obvious, suggesting that the conduction of cells in the cardiac cycle no significant contractile activity.