Department of Anatomical Sciences, School of Veterinary Medicine, Ferdowsi University of Mashhad, Mashhad, 91775-1793, Iran.
The detailed histology of the kidney was studied in rock dove, collared dove and owl (3 each). Each kidney consisted of a caudal, a middle and a cranial division. The cortex made up the vast majority of the kidney with only a small portion as medulla. They were arranged in cones of different lengths, which were distributed randomly within the kidney. Medullary nephron tubules were arranged in a sequential manner in all birds. Thick and thin limbs of Henle were separated by the collecting ducts. Histological and features of each component of nephron have been discussed.
Bird, kidney, histology, cortex, medulla
