The effect of seasonal variation occurring in testes and epididymis histological in Awassi rams

Abstract

The study was undertaken to investigate the seasonal variation occurring in histological study (testes and epididymis) of local rams during seasons of year. A total of 167 samples from ram's aged 7-12 months were collected from local slaughter house for one year. The histological study showed the testis consist of parenchymal tissue which contain semniferous tubules and interstitial tissue which also contain loose connective tissue, blood and lymph vessels and interstitial endocrine (leydig cells). The study also showed the epididymis consist of tanica serosa (outer layer) is followed by a smooth muscle layer (middle layer) and an epithelial layer (innermost). The cross section of testis and epididymis apparent to variation during the seasons. The autumn register increased on the numbers of spermatogonia comparison with both the spring and the summer seasons and increased in numbers of the layers of spermatogonia comparison with other seasons, and the lumen of seminiferous tubules and epididymis felled with spermatozoa during the autumn and the winter comparison with other seasons.