Brush Border

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brush border

[′brəsh ‚bȯr·dər]
(cell and molecular biology)
A superficial protoplasic modification in the form of filiform processes or microvilli; present on certain absorptive cells in the intestinal epithelium and the proximal convolutions of nephrons.

Brush Border

 

the aggregate of rod-shaped structures on the surface of certain cells in animals and humans. The brush border consists of separate cytoplasmic processes arranged like a brush along the free margin of the cells of the excretory ducts of the salivary glands, the convoluted uriniferous tubules of the kidney, and certain other epithelial cells. By substantially increasing the cell surface, the brush border promotes more intensive absorption and excretion of matter.