Fig. 2.

Microscopic examination of testes tissues of rats irradiated with different doses of γ-radiation. The C group a showing the thin basement membrane (BM) surrounding the seminiferous tubule. Sertoli cells (st) with indented euchromatic nuclei (N), Spermatid (sp) and Spermatocyte (cy) were seen. Spermatogonia (g) appear with ovoid nucleus (×6000). Rats irradiated with a single dose 2 Gy of γ-radiation b showing degeneration of sertoli cells (st) which contain swelling mitochondria (m) (×8000). Rats irradiated with a 4 Gy of γ-radiation c showing degeneration of spermatids, (SP) and cluster of spermatids with a characterized chromosomal “cap c” (×8000). Irradiated rats with a total dose 6 Gy d showing degenerated spermatids, (SP) and cytoplasmic tags (t) (×8000). Rats irradiated with a total dose 8 Gy of γ-radiation e showing highly degenerated spermatids, (SP) with deteriorated cytoplasm and blebbing of nuclear membrane (arrow), mitochondria appear as empty vesicles and spermatocytes (cy) with nuclei contain clumps of heterochromatin (×8000). Rats irradiated with a total dose 10 Gy f showing highly degenerated spermatids, (SP) with abnormal nuclei (N) which contain condensed heterochromatin (×8000). Number of rats in each group was 5