Figure 4

Ultra-structural micrograph of seminiferous tubule portion of diabetic rats treated with sildenafil citrate (1.44 mg/kg). Basement membrane (Bm) of the seminiferous tubule; cell of lamellated connective tissue (Cc); spermatogonium (Sg); Sertoli cell (Se); primary spermatocyte (SpI); secondary spermatocyte (SpII); spermatid (St); nucleus (N); mitochondria (m); flagellae of sperm cells (f).