columnar epithelium

columnar-epithelium的词性：
n.（名词）

1. Epithelium consisting of one or more cell layers, the most superficial of which is composed of elongated and somewhat cylindrical cells projecting toward the surface.
柱状上皮：表层由一层或多层细胞组成的上皮，最外层由延长及呈柱形细胞向表皮凸出构成