轴突内可见丝状的神经原纤维及线粒体，轴突外包有髓鞘，为明暗相间的同心圆板层结构。
Filamentous neurofibrils and mitochondria were observed in axons. Axons were enveloped by myelin sheath, presented alternately dark and bright lamellae concentric configuration.
它们都常规的在血液中循环。纤维蛋白原转变成不可溶的丝状的蛋白质——纤维蛋白，纤维蛋白限制血小板的运动并且使血小板连接成“被子”以止血。
In particular they round up cellular fragments called platelets, and also molecules of a soluble protein called fibrinogen, both of which circulate routinely in the bloodstream.
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