The present work was carried out on 20 testes and epididymis of sexually mature camels to elucidate the gross anatomical, morphometerical, light microscopical and scanning electron microscopical features of the epididymis in different seasons. Anatomically, the epididymal duct of a camel consists of three parts head, body and tail. Histomorphologically, the epididymal duct is subdivided into initial, middle and terminal segments, of which the middle segment is further subdivided into proximal, intermediate and distal parts. There is a gradual decrease in the epithelial height of the epididymal duct from the initial to the terminal segments. This mechanically facilities passage of the sperms toward the terminal segment. High epithelium in the initial segment may indicate a more absorptive power of the epithelium in this segment. The seasonal reproductivety of the epididymal duct in the camel expressed by variations in the weight and volume of the epididymis, total diameter of the epididymal duct, epithelial height, length of the stereocilia, thickness of the muscular coat and cellular distributions in different segments. The spring months offer ideal circumstances for maximal reproductive activity in this species. The cellular components of the epididymal duct epithelium of the camel displays important morphological changes from season to another showing signs of increasing activity during spring in comparison to decreasing activity in other seasons. PAS positive granules are demonstrated in different segments of the epididymal duct and intraepithelial glands in different seasons. These granules are relatively more numerous in spring. The lamina propria surrounding the epididymal duct contains a layer of the elastic fibers which is very thick in winter, thick in spring and thin in other seasons. This increase in thickness of the elastic fibers predisposes for the increase in the total diameter of the epididymal duct in spring. It was conclude that the muscular coat of the middle and terminal segments is the thickest in spring that may be helpful for powerful ejaculation.
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