Figure 17a: a) Photomicrograph of a section in testis of albino rat aged 7 weeks exposed to noise (group IIb) showing localized thickness in tunica albuginea (ta) with congestion of blood vessels (Bv) of tunica vascuolsa (tv) and interstitial tissue (I). Seminiferous tubules (T) show marked distortion and irregular outlines especially peripherally (arrows).