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Medulla
The thin limb of the loop of Henle is lined by a simple squamous epithelium whose thickness is usually greater than that of a capillary. The ascending thick limb is lined with a simple cuboidal epithelium whose nuclei are irregularly arranged around and bulge into the lumen. 400x

Thin limb of loop of Henle
The thin limb of the loop of Henle is lined by a simple squamous epithelium whose thickness is usually greater than that of a capillary. The ascending thick limb is lined with a simple cuboidal epithelium whose nuclei are irregularly arranged around and bulge into the lumen. 400x

Ascending thick limb
The thin limb of the loop of Henle is lined by a simple squamous epithelium whose thickness is usually greater than that of a capillary. The ascending thick limb is lined with a simple cuboidal epithelium whose nuclei are irregularly arranged around and bulge into the lumen. 400x

Vasa recta
The thin limb of the loop of Henle is lined by a simple squamous epithelium whose thickness is usually greater than that of a capillary. The ascending thick limb is lined with a simple cuboidal epithelium whose nuclei are irregularly arranged around and bulge into the lumen. 400x