Figure 9.

(A,B) Cross-section of the sperm showing uniform dimensions of the mitochondrial derivatives (md). In (A), various levels of the sperm are depicted: in the lower right corner of the figure, note the most anterior region of the nucleus (N) and acrosome (A). At the tail end (arrows), disorganization of the axonemal microtubules is evident. Among the sperm cells, numerous virus-like particles (vlp) are visibly free in the intercellular space. The virus-like particles exhibit a filamentous appearance and are filled with electron-dense material. Also, tubules (t) are present and free in the intercellular space.