![This is blank.](https://digitalhistology.org/wp-content/themes/histology-unified/imgs/trans.png)
Simple columnar epithelium
Simple columnar epithelium lines the intestine, as seen here in the duodenum. Also visible is a brush border, composed of closely packed microvilli, which are commonly present on simple columnar epithelia. Interspersed between the cells are unicellular glands called goblet cells which secrete mucus. The mucus is released onto the epithelial surface. Small intestine 300x
![Simple columnar epithelium <p>Simple columnar epithelium lines the intestine, as seen here in the duodenum. Also visible is a brush border, composed of closely packed microvilli, which are commonly present on simple columnar epithelia. Interspersed between the cells are unicellular glands called goblet cells which secrete mucus. The mucus is released onto the epithelial surface. Small intestine 300x</p>](https://digitalhistology.org/wp-content/uploads/2017/06/T.E.Lin_.Simp-9-1-ping-1.png)
Simple columnar epithelium
Simple columnar epithelium lines the intestine, as seen here in the duodenum. Also visible is a brush border, composed of closely packed microvilli, which are commonly present on simple columnar epithelia. Interspersed between the cells are unicellular glands called goblet cells which secrete mucus. The mucus is released onto the epithelial surface. Small intestine 300x
![- Nuclei <p>Simple columnar epithelium lines the intestine, as seen here in the duodenum. Also visible is a brush border, composed of closely packed microvilli, which are commonly present on simple columnar epithelia. Interspersed between the cells are unicellular glands called goblet cells which secrete mucus. The mucus is released onto the epithelial surface. Small intestine 300x</p>](https://digitalhistology.org/wp-content/uploads/2017/06/T.E.Lin_.Simp-9-2-ping-1.png)
- Nuclei
Simple columnar epithelium lines the intestine, as seen here in the duodenum. Also visible is a brush border, composed of closely packed microvilli, which are commonly present on simple columnar epithelia. Interspersed between the cells are unicellular glands called goblet cells which secrete mucus. The mucus is released onto the epithelial surface. Small intestine 300x
![- Microvilli (brush border) <p>Simple columnar epithelium lines the intestine, as seen here in the duodenum. Also visible is a brush border, composed of closely packed microvilli, which are commonly present on simple columnar epithelia. Interspersed between the cells are unicellular glands called goblet cells which secrete mucus. The mucus is released onto the epithelial surface. Small intestine 300x</p>](https://digitalhistology.org/wp-content/uploads/2017/06/T.E.Lin_.Simp-9-3-ping-1.png)
- Microvilli (brush border)
Simple columnar epithelium lines the intestine, as seen here in the duodenum. Also visible is a brush border, composed of closely packed microvilli, which are commonly present on simple columnar epithelia. Interspersed between the cells are unicellular glands called goblet cells which secrete mucus. The mucus is released onto the epithelial surface. Small intestine 300x
![- Unicellular glands (goblet cells) <p>Simple columnar epithelium lines the intestine, as seen here in the duodenum. Also visible is a brush border, composed of closely packed microvilli, which are commonly present on simple columnar epithelia. Interspersed between the cells are unicellular glands called goblet cells which secrete mucus. The mucus is released onto the epithelial surface. Small intestine 300x</p>](https://digitalhistology.org/wp-content/uploads/2017/06/T.E.Lin_.Simp-9-4-ping-1.png)
- Unicellular glands (goblet cells)
Simple columnar epithelium lines the intestine, as seen here in the duodenum. Also visible is a brush border, composed of closely packed microvilli, which are commonly present on simple columnar epithelia. Interspersed between the cells are unicellular glands called goblet cells which secrete mucus. The mucus is released onto the epithelial surface. Small intestine 300x
![Basement membrane <p>Simple columnar epithelium lines the intestine, as seen here in the duodenum. Also visible is a brush border, composed of closely packed microvilli, which are commonly present on simple columnar epithelia. Interspersed between the cells are unicellular glands called goblet cells which secrete mucus. The mucus is released onto the epithelial surface. Small intestine 300x</p>](https://digitalhistology.org/wp-content/uploads/2017/06/T.E.Lin_.Simp-9-5-ping-1.png)
Basement membrane
Simple columnar epithelium lines the intestine, as seen here in the duodenum. Also visible is a brush border, composed of closely packed microvilli, which are commonly present on simple columnar epithelia. Interspersed between the cells are unicellular glands called goblet cells which secrete mucus. The mucus is released onto the epithelial surface. Small intestine 300x
![Loose connective tissue <p>Simple columnar epithelium lines the intestine, as seen here in the duodenum. Also visible is a brush border, composed of closely packed microvilli, which are commonly present on simple columnar epithelia. Interspersed between the cells are unicellular glands called goblet cells which secrete mucus. The mucus is released onto the epithelial surface. Small intestine 300x</p>](https://digitalhistology.org/wp-content/uploads/2017/06/T.E.Lin_.Simp-9-6-ping.png)
Loose connective tissue
Simple columnar epithelium lines the intestine, as seen here in the duodenum. Also visible is a brush border, composed of closely packed microvilli, which are commonly present on simple columnar epithelia. Interspersed between the cells are unicellular glands called goblet cells which secrete mucus. The mucus is released onto the epithelial surface. Small intestine 300x
![Intestinal lumen <p>Simple columnar epithelium lines the intestine, as seen here in the duodenum. Also visible is a brush border, composed of closely packed microvilli, which are commonly present on simple columnar epithelia. Interspersed between the cells are unicellular glands called goblet cells which secrete mucus. The mucus is released onto the epithelial surface. Small intestine 300x</p>](https://digitalhistology.org/wp-content/uploads/2017/06/T.E.Lin_.Simp-9-7-ping.png)
Intestinal lumen
Simple columnar epithelium lines the intestine, as seen here in the duodenum. Also visible is a brush border, composed of closely packed microvilli, which are commonly present on simple columnar epithelia. Interspersed between the cells are unicellular glands called goblet cells which secrete mucus. The mucus is released onto the epithelial surface. Small intestine 300x