The effect of microgravity on tissue structure and function of rat testis. Ye Ding, Jin Tang, Jun Zou, Ruiping She, Yinghua Wang, Zhuo Yue, Jijing Tian, Kangkang Xia, Jun Yin and Desheng Wang. Braz J Med Biol Res 2011; 44: 1243-1250.

Figure 2. Electron micrographs of testis tissue from the control and experimental groups. A, B, C, Control groups showed that the basal lamina of seminiferous tubules was intact and all stages of spermatogenic cells and spermatozoa were present in the tubules (arrow). D, E, F, In the tail suspension groups the basal lamina of seminiferous tubules was rough and germinal cell loss and seriously necrotic tubules were observed (arrow).