![This is blank.](https://digitalhistology.org/wp-content/themes/histology-unified/imgs/trans.png)
Gall bladder: epithelium
The epithelium lining the gall bladder is simple columnar with short microvilli; its oval nuclei are located in the lower one-third of each cell. The apical cytoplasm is filled with mitochondria, which supply energy to concentrate the bile, as well as secretory granules containing mucinogen. Additional mucus is added to the bile by the larger bile ducts. 1000x
![Simple columnar epithelium <p>The epithelium lining the gall bladder is simple columnar with short microvilli; its oval nuclei are located in the lower one-third of each cell. The apical cytoplasm is filled with mitochondria which supply energy to concentrate the bile as well as secretory granules containing mucinogen. Additional mucus is added to the bile by the larger bile ducts. 1000x</p>](https://digitalhistology.org/wp-content/uploads/2017/10/Or.Dig_.MajGl_.GB-4-1-ping.png)
Simple columnar epithelium
The epithelium lining the gall bladder is simple columnar with short microvilli; its oval nuclei are located in the lower one-third of each cell. The apical cytoplasm is filled with mitochondria which supply energy to concentrate the bile as well as secretory granules containing mucinogen. Additional mucus is added to the bile by the larger bile ducts. 1000x
![- Location of mitochondria and granules <p>The epithelium lining the gall bladder is simple columnar with short microvilli; its oval nuclei are located in the lower one-third of each cell. The apical cytoplasm is filled with mitochondria which supply energy to concentrate the bile as well as secretory granules containing mucinogen. Additional mucus is added to the bile by the larger bile ducts. 1000x</p>](https://digitalhistology.org/wp-content/uploads/2017/10/Or.Dig_.MajGl_.GB-4-2-ping.png)
- Location of mitochondria and granules
The epithelium lining the gall bladder is simple columnar with short microvilli; its oval nuclei are located in the lower one-third of each cell. The apical cytoplasm is filled with mitochondria which supply energy to concentrate the bile as well as secretory granules containing mucinogen. Additional mucus is added to the bile by the larger bile ducts. 1000x
![- Microvilli <p>The epithelium lining the gall bladder is simple columnar with short microvilli; its oval nuclei are located in the lower one-third of each cell. The apical cytoplasm is filled with mitochondria which supply energy to concentrate the bile as well as secretory granules containing mucinogen. Additional mucus is added to the bile by the larger bile ducts. 1000x</p>](https://digitalhistology.org/wp-content/uploads/2017/10/Or.Dig_.MajGl_.GB-4-3-ping.png)
- Microvilli
The epithelium lining the gall bladder is simple columnar with short microvilli; its oval nuclei are located in the lower one-third of each cell. The apical cytoplasm is filled with mitochondria which supply energy to concentrate the bile as well as secretory granules containing mucinogen. Additional mucus is added to the bile by the larger bile ducts. 1000x
![Mucus <p>The epithelium lining the gall bladder is simple columnar with short microvilli; its oval nuclei are located in the lower one-third of each cell. The apical cytoplasm is filled with mitochondria which supply energy to concentrate the bile as well as secretory granules containing mucinogen. Additional mucus is added to the bile by the larger bile ducts. 1000x</p>](https://digitalhistology.org/wp-content/uploads/2017/10/Or.Dig_.MajGl_.GB-4-4-ping.png)
Mucus
The epithelium lining the gall bladder is simple columnar with short microvilli; its oval nuclei are located in the lower one-third of each cell. The apical cytoplasm is filled with mitochondria which supply energy to concentrate the bile as well as secretory granules containing mucinogen. Additional mucus is added to the bile by the larger bile ducts. 1000x
![Lamina propria <p>The epithelium lining the gall bladder is simple columnar with short microvilli; its oval nuclei are located in the lower one-third of each cell. The apical cytoplasm is filled with mitochondria which supply energy to concentrate the bile as well as secretory granules containing mucinogen. Additional mucus is added to the bile by the larger bile ducts. 1000x</p>](https://digitalhistology.org/wp-content/uploads/2017/10/Or.Dig_.MajGl_.GB-4-5-ping.png)
Lamina propria
The epithelium lining the gall bladder is simple columnar with short microvilli; its oval nuclei are located in the lower one-third of each cell. The apical cytoplasm is filled with mitochondria which supply energy to concentrate the bile as well as secretory granules containing mucinogen. Additional mucus is added to the bile by the larger bile ducts. 1000x
![Image source > <p>Image taken of slide in the University of Mississippi collection.</p>](https://digitalhistology.org/wp-content/uploads/2017/10/Or.Dig_.MajGl_.GB-4-6-ping.png)
Image source >
Image taken of slide in the University of Mississippi collection.