Pawlicki R
Folia Histochem Cytobiol. 1984;22(1):33-41.
Examination was made on the fossil dinosaur bone 80 million years old. Samples to be examined were prepared by specially elaborated methods. The vascular canal of the dinosaur bone was the object of study. The microscopic and ultrastructural images of the canal revealed three zones therein: proper, perivascular, and vascular. The zone proper was formed by the mineralized wall of the canal, the perivascular zone was a space between the proper and the vascular zone, and the vascular zone was made up of the canal contents identified with blood vessels. The perivascular zone contained collagen fibres; moreover, histochemical examinations revealed in it mucopolysaccharides and lipids. In the wall of the vascular canal (zone proper) the outlets of the bone canaliculi departing from the osteocyte lacunae were detected. The endings of these canaliculi were of two kinds: they were either of the same diameter as the rest of the canaliculus (more numerous) or assumed a widening funnel form as the canaliculi reached the vascular canal (less numerous). By analogy with modern bone appropriate functions may be ascribed to particular zones distinguished in the vascular canal and to the varied endings of the bone canaliculi in the system of conveyance of nutrient and conservative elements as well as metabolites.
对一块8000万年前的恐龙化石骨骼进行了检查。待检查的样本通过特殊精心设计的方法制备。恐龙骨骼的血管管道是研究对象。该管道的微观和超微结构图像显示其中有三个区域：固有区、血管周围区和血管区。固有区由管道的矿化壁形成，血管周围区是固有区和血管区之间的空间，血管区由与血管一致的管道内容物组成。血管周围区含有胶原纤维；此外，组织化学检查显示其中含有粘多糖和脂质。在血管管道壁（固有区）中检测到从骨细胞腔隙发出的骨小管的出口。这些骨小管的末端有两种类型：它们要么与骨小管的其余部分直径相同（数量较多），要么在骨小管到达血管管道时呈扩大的漏斗状（数量较少）。通过与现代骨骼类比，可以将血管管道中区分出的特定区域以及骨小管在营养和保守元素以及代谢产物运输系统中的不同末端赋予适当的功能。
