Major tubular structures of the cortex. Underlying the renal capsule are the major tubular structures of the cortex. The proximal convoluted tubules are eosinophilic cuboidal epithelium and are often found near the renal corpuscles. They have microvilli on their apical surface. Also near the renal corpuscles are the distal convoluted tubules which are cuboidal epithelium and have a basophilic appearance. These cells are often larger than the proximal tubules and has a similar eosinophilic staining quality. The cuboidal cells are larger and also have microvilli on their apical surface. Collecting tubules are quite basophilic, and are composed of two cell types; cuboidal epithelium and mucus-containing flask cells. Image from AF Wiechmann and CR Wirsig (2003) "Color Atlas of Xenopus laevis Histology", (page 59, Chapter 6, Urinary system: Figure 6). Copyright 2003. Kluwer Academic Publishers. Reproduced with kind permission from Springer Science & Business Media B.V.
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