TY - JOUR ID - TI - Comparative histomorphological study on the kidney of two Iraqi birds (Barn owl, Tyto alba (Scopoli,1769) and black Iraqi partridge, Francolinus francolinus (Linnaeus, 1766)) Comparative histomorphological study on the kidney of two Iraqi birds (Barn owl, Tyto alba (Scopoli,1769) and black Iraqi partridge, Francolinus francolinus (Linnaeus, 1766)) AU - Hussain A. M. Dauod and Israa A. A. PY - 2021 VL - 9 IS - 1 SP - 219 EP - 226 JO - Journal of Genetic and Environmental Resources Conservation مجلة صيانة المصادر الوراثية والبيئية SN - 23068663 23068280 AB - The present study aimed to investigate the histomorphology of kidneys in two Iraqi birds (Barn owl, Tyto alba and Black Iraqi partridge, Francolinus francolinus), as a comparative study. Results of the anatomical study revealed that both barn owl and black Iraqi partridge possess pair of kidneys which are appeared as a large, sold, elongated and lobulated structure lie symmetrically at both sides of vertebral column within a bony depression of synsacrum called renal fossa. Each kidney of both studied birds is covered by a thin and smooth capsule of connective tissue. Each kidney possess a ureter extend from the posterior end of cranial lobe of each kidney to the cloaca and open at urodeum. Histological study revealed that the essential units of each kidney represented by alobules which appeared as sections of conical- shaped in barn owl, while they were oval-shaped in black Iraqi partridge. Each lobule consists of cortex and medulla. Glomerulus appeared in both species of studied birds as a spherical structure distributed randomly within kidney tissue, and each glomerulus has vascular and renal poles. Result showed that the proximal convoluted tubule (PCT) in both species under investigation lined by simple cuboidal epithelium with brush border at the free surface.The distal convoluted tubule (DCT) lined by simple cuboidal epithelium with no brush border at the free surface of the cells. On the other hand the thin and thick parts of Henle’s loop are lined by simple cuboidal epithelium with low cuboidal cells. The collecting tubules appeared lined with epithelial tissue ranged from simple cuboidal to simple low columnar and the collecting duct appeared lined with simple columnar epithelium.

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