Read the following.(a)     Cells are tall and slender (b)    Nuclei are located at the base of the cells(c)     Free surface of cells has microvilliEpithelium with all the above features forms the lining of

The columnar epithelium is composed of a single layer of tall and slender cells. Their nuclei are located at the base. Free surface may have microvilli. They are found in the lining of stomach and intestine and help in secretion and absorption. Microvilli are absent in the stomach.