author(s)
Hadaf H Mohammed and Hussein K Doohi

abstract
The present study was conducted during the period from September to November 2016 to record the histomorphology and the histochemistry of the ampulla of vas deferens of gazelle one of the most important breeds in Iraq. Eight adult animals were utilized to this study. Ampulla showed distinct four layers, tunica mucosa, tunica submucosa, tunica muscularis and tunica adventitia. Tubulo-alveolar glandular was present in the propria-submucosa. The lining epithelium of the tunica mucosa is a pseudostratified columnar epithelium between glandular end-pieces consisted of collagen fibers. The tunica muscularis consisted of two distinct layers, inner and outer circular. The longitudinal mainly consisted of smooth muscle fibers, collagen fibers and few reticular fibers. The tunica adventitia consisted of the loose arranged collagen, elastic and reticular fibers. The diameter of the alveoli was 31 µm + 1.23 while the epithelial height was 52 µm + 0.48. The muscular layer thickness was 735 µm+ 0.21. The secretions stained intensely with PAS indicating the presence of mucopolysaccharides that serve the nutrition to ejaculated spermatozoa.