Figure 6 : (A) Electron micrograph of adult albino rat testis of group Ashowing that the primary spermatocyte with its hetrochromatic nucleus (N). Its cytoplasm contains small mitochondria (m).

(B) Electron micrograph of testis of adult rat of group B showing that the cytoplasm of the primary spermatocyte has many small vacuolations(orange arrow) and degenerated mitochondria (m). Notice that it has irregular nucleus (N) with absence of hetrochromatin.
(C) Electron micrograph of the testis of adult albino rat group C showing that the primary spermatocyte has small mitochondria (m) and heterochromatic nucleus (N).

Mohamed et al.Journal of Histology & Histopathology  2015 2:21DOI : 10.7243/2055-091X-2-21