Microvilli, Brush Border-Duodenum

The cell surfaces of resorptive cells feature a dense cover of microvilli. The microvilli extend upward from the surface and create a pattern, which can be recognize d in light microscopy as a light, stripe d border, the brush border 1 .  It is PAS-positive and contains several marker enzymes, which partake in resorptive cell activities. The figure shows Pseudostratified columnar epithelial surface cells from a small intestinal crypt. Goblet cells 2 , filled with secretor y products, exist side by side with the epithelial cells.

1 Brush border

2 Goblet cell with secretor y product

3 Lamina propria mucosae

4 Intestinal crypt

Stain: azan; magnification: × 160

References

Kuehnel, W.(2003). Color Atlas of Cytology, Histology, and Microscopic Anatomy. 4^th edition . Institute of Anatomy Universitätzu Luebeck Luebeck, Germany . Thieme Stuttgar t · New York .