Roggendorf W, Cervós-Navarro J, Lazaro-Lacalle M D
Cell Tissue Res. 1978 Sep 26;192(3):461-74. doi: 10.1007/BF00212326.
Intracerebral venules of the cat were examined to establish criteria for a distinct separation between the venous and arterial system, and to characterize, in greater detail, the mural construction of individual venules. The intracerebral venules compared with those of other organs. Venules do not have a vascular wall composed clearly of endothelium, media, and adventitia, as is characteristic of arteries and arterioles. The venous endothlium has a similar structure to that of capillaries. The periendothelial cells of the venule differ in shape depending on the vascular diameter. The number of periendothelial cell processes in postcapillary venules increases progressively. Segments in which the basal lamina of the endothelium merges with that of the glia cover a smaller portion of the circumference than in venous capillary loops. In collecting venules, the endothelium is almost completely enveloped by periendothelial cells which have a larger number of filaments. There are no typical smooth muscle cells in the intracerebral venules. The perivascular space becomes wider in collecting venules, contains adventitial cells, phagocytes and a great number of collagen fibers.
对猫的脑内小静脉进行了检查，以确定静脉系统和动脉系统之间明显区分的标准，并更详细地描述单个小静脉的壁结构。将脑内小静脉与其他器官的小静脉进行了比较。小静脉没有像动脉和小动脉那样明显由内皮、中膜和外膜组成的血管壁。静脉内皮具有与毛细血管相似的结构。小静脉的周内皮细胞形状因血管直径而异。毛细血管后小静脉中周内皮细胞突起的数量逐渐增加。内皮基膜与神经胶质基膜融合的节段覆盖的圆周部分比静脉毛细血管环中的小。在集合小静脉中，内皮几乎完全被具有大量细丝的周内皮细胞包裹。脑内小静脉中没有典型的平滑肌细胞。集合小静脉中的血管周围间隙变宽，含有外膜细胞、吞噬细胞和大量胶原纤维。
