Columnar cells lining the small intestine have a brush border of microvilli on the apical surface.

Name: Columnar cells lining the small intestine have a brush border of microvilli on the apical surface.
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Columnar cells lining the small intestine have a specialized structure called a brush border on their apical surface, which consists of dense microvilli that increase the surface area for absorption of nutrients.

Columnar Cells Lining the Small Intestine Have a Brush Border