![This is blank.](https://digitalhistology.org/wp-content/themes/histology-unified/imgs/trans.png)
Medulla
Visible in this image, are thin limbs of the loop of Henle, ascending thick limbs, and a medullary collecting duct. The proximal straight tubules do not extend this deeply into the medulla. Medullary collecting ducts converge to form the large ducts of Bellini, which empty into minor calyces. The vasa recta contain numerous red blood cells. 10x, 400x
![Thin limbs of loop of Henle <p>Visible in this image, are thin limbs of the loop of Henle, ascending thick limbs, and a medullary collecting duct. The proximal straight tubules do not extend this deeply into the medulla. Medullary collecting ducts converge to form the large ducts of Bellini, which empty into minor calyces. The vasa recta contain numerous red blood cells. 10x, 400x</p>](https://digitalhistology.org/wp-content/uploads/2018/02/Or.Ur_.Tub-14-4-ping.png)
Thin limbs of loop of Henle
Visible in this image, are thin limbs of the loop of Henle, ascending thick limbs, and a medullary collecting duct. The proximal straight tubules do not extend this deeply into the medulla. Medullary collecting ducts converge to form the large ducts of Bellini, which empty into minor calyces. The vasa recta contain numerous red blood cells. 10x, 400x
![Ascending thick limbs <p>Visible in this image, are thin limbs of the loop of Henle, ascending thick limbs, and a medullary collecting duct. The proximal straight tubules do not extend this deeply into the medulla. Medullary collecting ducts converge to form the large ducts of Bellini, which empty into minor calyces. The vasa recta contain numerous red blood cells. 10x, 400x</p>](https://digitalhistology.org/wp-content/uploads/2018/02/Or.Ur_.Tub-14-1-ping.png)
Ascending thick limbs
Visible in this image, are thin limbs of the loop of Henle, ascending thick limbs, and a medullary collecting duct. The proximal straight tubules do not extend this deeply into the medulla. Medullary collecting ducts converge to form the large ducts of Bellini, which empty into minor calyces. The vasa recta contain numerous red blood cells. 10x, 400x
![Vasa recta <p>Visible in this image, are thin limbs of the loop of Henle, ascending thick limbs, and a medullary collecting duct. The proximal straight tubules do not extend this deeply into the medulla. Medullary collecting ducts converge to form the large ducts of Bellini, which empty into minor calyces. The vasa recta contain numerous red blood cells. 10x, 400x</p>](https://digitalhistology.org/wp-content/uploads/2018/02/Or.Ur_.Tub-14-3-ping.png)
Vasa recta
Visible in this image, are thin limbs of the loop of Henle, ascending thick limbs, and a medullary collecting duct. The proximal straight tubules do not extend this deeply into the medulla. Medullary collecting ducts converge to form the large ducts of Bellini, which empty into minor calyces. The vasa recta contain numerous red blood cells. 10x, 400x
![Medullary collecting duct > <p>Medullary collecting ducts are lined by a columnar epithelium consisting of pale staining principle cells and darker staining intercalated cells, which are much less numerous. Intercalated cells often bulge into the lumen of the tubule.</p>](https://digitalhistology.org/wp-content/uploads/2018/02/Or.Ur_.Tub-14-2-ping.png)
Medullary collecting duct >
Medullary collecting ducts are lined by a columnar epithelium consisting of pale staining principle cells and darker staining intercalated cells, which are much less numerous. Intercalated cells often bulge into the lumen of the tubule.
![- Principle cells <p>Medullary collecting ducts are lined by a columnar epithelium consisting of pale staining principle cells and darker staining intercalated cells, which are much less numerous. Intercalated cells often bulge into the lumen of the tubule.</p>](https://digitalhistology.org/wp-content/uploads/2018/02/Or.Ur_.Tub-14-5-ping.png)
- Principle cells
Medullary collecting ducts are lined by a columnar epithelium consisting of pale staining principle cells and darker staining intercalated cells, which are much less numerous. Intercalated cells often bulge into the lumen of the tubule.
![- Intercalated cells <p>Medullary collecting ducts are lined by a columnar epithelium consisting of pale staining principle cells and darker staining intercalated cells, which are much less numerous. Intercalated cells often bulge into the lumen of the tubule</p>](https://digitalhistology.org/wp-content/uploads/2018/02/Or.Ur_.Tub-14-6-ping.png)
- Intercalated cells
Medullary collecting ducts are lined by a columnar epithelium consisting of pale staining principle cells and darker staining intercalated cells, which are much less numerous. Intercalated cells often bulge into the lumen of the tubule