血管中层的肌纤维和外膜的结缔组织，都是从包围原始内皮细胞的间质中发育出来的。
Vessels of the outer membrane and middle muscle tissue, both from the original endothelial cells surround stroma development.
结果：（1）外膜去除方法对血管内皮及中层平滑肌无明显损伤；
Results: (1) The adventitia had been removed partially, meanwhile, its intima and media had little injury;
葡萄膜，腿色素层眼中层血管层，它构成虹膜，睫。
The vascular middle layer of the eye constituting the iris, ciliary body, and choroid.
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