Histological Study of Ureter and Urinary Bladder of the Adult Black-Tailed Gazelle (Gazella Subgutturosa)

Abstract

The histological characteristics of the ureter and the urinary bladder in the Iraqi black-tailed gazelle were investigated by using the histological methods. The current study revealed that both ureter and urinary bladder had the same general histological structures, the wall of each organ consisted of three layers (mucosal layer, muscular layer and adventitia). In ureter the middle muscular layer was circular, thick and clearly distinct. In urinary bladder the mucosa was less folded and the muscular layers were well distinguished and thicker. The urothelium (transitional epithelium) lines the luminal surface of the ureters, and the urinary bladder, it was stratified and consisted of ( basal cells, intermediate and the superficial cells). The basal cells were cuboidal to columnar, the intermediate cells was piriform with dark nuclei. The surface cells were large round with pale stained cytoplasm and small dark stained nucleus .The apical membrane of the surface cells was thickened and appeared as dark area. Because of the present of such specialized lining epithelium with the modification of luminal surface of the apical cells membrane , The study suggest that the ureter and urinary bladder of black tail Gazelle was able to with stand the effect of concentrated urine .