Simple Columnar with Microvilli

This image shows the brush border of intestinal epithelium, which features simple columnar epithelial cells with basal nuclear polarity and an apical surface with microvilli. Note the size of the microvilli relative to the cells that they cover. What is the function of the microvilli?

Answer: Increase the surface area of the apical plasma membrane to allow for more efficient uptake of nutrients from the intestine.