Figure 8 : (A) Electron micrograph of adult albino rat testis of group A showing transverse sections of the different pieces of the tails of the spermatozoa.

The middle piece (M) has characteristic arrangement of its mitochondria (m). Notice principle piece (P) and end piece (E).
(B) Electron micrograph of the testis of adult rat of group B showing that most of pieces of the tail of the sperm cannot be recognized (arrow). Notice that end pieces (E) have illdefined plasmalemma. Notice that the detailed structures of the longitudinal section of the sperm (Z) cannot be recognized.
(C) Electron micrograph of the testisof adult albino rat group C showing that most of transverse sections of the tail of the sperms appear similar to that of group A but some pieces are affected. Notice the middle piece (M) has ill- defined mitochondria and the principal piece (P) has disrupted plasmalemma.

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