房室束横断面大多为三角形，外包有疏松结缔组织鞘。
His's bundle surround by loose connective tissues, was mostly triangle in shape.
内根鞘、外根鞘界限模糊，结缔组织性鞘细胞纤维排列杂乱，结缔组织细胞减少。
The bourn of internal root sheath and external root sheath was blurry, the fiber of connective tissue sheath cell arrayed disordered, the number of connective tissue cell reduced.
水溶性药物的另一个屏障是胶质结缔组织细胞(星形细胞)，该细胞所形成的星形细胞鞘与毛细血管内皮基膜紧密邻接。
Another barrier to water-soluble drugs is the glial connective tissue cells (astrocytes), which form an astrocytic sheath close to the basement membrane of the capillary endothelium.
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