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Columnar epithelium is formed of pillar-cells which longer than broad. Their nuclei are elongated and situated near the base. The free surface of columnar cells of intestine is produced into finger-like projections called microvilli which increase absortive surface.
Columnar epithelium lines pharynx, stomach, intestine, larynx and oviduct. It is also found in sweat glands and sebaceous glands and functions in secreation and absorbtion.

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1. Its cells are long and pillar like.
2. Their height exceeds their width.
3. Their nuclei are also elongated and lie in the basal part.