Histology and histometry of different parts of urinary bladder in Camelus dromedarius

6 adult male one humped camels aged between 7–11 years start. Tissue samples of apex, body and the neck of urinary bladder were obtained from. The sections were stained with haematoxylin and eosin (H&E), Masson's trichrome and Verhoff staining. In histological studies, the wall of urinary bladder consisted of tunica mucosa, tunica submucosa, tunica muscularis and tunica serosa. Urinary bladder was covered by folded transitional epithelium on mucosal surface. The collagen and elastic fibres, many artery and lymphatic vessels in lamina properia were also seen. Lamina muscularis mucosa was composed of longitudinal bundles of smooth muscles. Tunica muscularis was consisted of smooth muscles in different directions. Tunica adventitia was composed of areolar connective tissue with blood and lymphatic vessels and nerves endings. Our data analysis indicated that, the mean width of epithelium as well lamina propria in neck of urinary bladder were greater than other parts and the difference was significant (P> 0.05). There was no significant difference between other parameters of urinary bladder.