On the medullary substance surface, there is a layer of simple epithelium.
淋巴小结的髓质外侧表面付有单层上皮。
Simple cuboidal epithelium lining a tubule (longitudinal cut). Some of the cell boundaries between "blocks" or "cubes" here are quite distinct.
管腔纵切面：单层立方上皮衬于管腔内。一些立方细胞之间的边界相当清晰明显。
A thin cyst Paries, is simple squamous epithelium and containing crystal serous fluid inside the cyst.
囊壁薄，为单层扁平上皮，囊内含清亮浆液性液体。
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