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首页> 外文期刊>International Journal of Zoology >Distribution and Structure of Purkinje Fibers inthe Heart of Ostrich (Struthio camelus) with the SpecialReferences on the infrastructure
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Distribution and Structure of Purkinje Fibers inthe Heart of Ostrich (Struthio camelus) with the SpecialReferences on the infrastructure

机译：浦肯野纤维在鸵鸟心中的分布和结构及其对基础设施的特别参考

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摘要

Purkinje fibers or Purkinje cardiomyocytes are part of the whole complex of the cardiac conduction system, which is today classified as specific heart muscle tissue responsible for the generation of the heart impulses. From the point of view of theirdistribution, structure and ultrastructural composition of the cardiac conduction system in the ostrich heart were studied by light and electron microscopy. These cells were distributed in cardiac conducting system including S A node, AV node, His bundleand branches as well as endocardium, pericardium, myocardium around the coronary arteries, moderator bands, white fibrous sheet in right atrium, and left septal attachment of AV valve. The great part of the Purkinje fiber is composed of clear, structureless sarcoplasm, and the myofibrils tend to be confined to a thin ring around the periphery of the cells. They have one or more large nuclei centrally located within the fiber. Ultrastructurally, they are easily distinguished. The main distinction feature is the lack of electron density and having a light appearance, due to the absence of organized myofibrils. P-cells usually have two nuclei with a mass of short, delicate microfilaments scattered randomly in the cytoplasm; they contain short sarcomeresand myofibrillar insertion plaque. They do not have T-tubules.
机译：浦肯野纤维或浦肯野心肌细胞是心脏传导系统整个复合体的一部分，如今已被归类为负责产生心脏冲动的特定心肌组织。从它们的分布角度，通过光学和电子显微镜研究了鸵鸟心脏中心脏传导系统的结构和超微结构。这些细胞分布在心脏传导系统中，包括S A结，AV结，His束和分支以及心内膜​​，心包膜，冠状动脉周围的心肌，调节带，右心房中的白色纤维片和AV瓣的左中隔附着。浦肯野纤维的大部分由透明的，无结构的肌浆组成，肌原纤维通常局限于细胞周围的细环。它们在纤维内部居中有一个或多个大核。超微结构，很容易区分。主要区别特征是由于缺乏有组织的肌原纤维而缺乏电子密度并且外观较浅。 P细胞通常具有两个细胞核，大量短而细腻的微丝随机散布在细胞质中。它们含有短的肉瘤和肌原纤维插入斑块。他们没有T管。

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