Function: increase the surface areas Distribution: striated border(纹状缘): intestinal epi. cell ◆ brush border(刷状缘 proximal renal tubule 顶部致密细胞质 Histology Lab Part 16: Slide 55 微丝 连桥 1818 Function: increase the surface areas Distribution: ◆ striated border(纹状缘): intestinal epi. cell ◆ brush border (刷状缘): proximal renal tubule