Figure 2. 

Sagittal section of testis during starvation. The blue lines indicate the innermost region and the yellow lines indicate that the border between the testis region and the surrounding tissue. d: days after starvation, sg: spermatogonium, sc: spermatocyte, st: spermatid, sp: spermatozoa. Scale bar: 100 μm.

 
  Part of: Dong Z, Shi C, Chu G, Dong Y, Chen G, Liu D (2018) Morphological changes of gonad and gene expression patterns during desexualization in Dugesia japonica (Platyhelminthes: Dugesiidae). Zoologia 35: 1-7. https://doi.org/10.3897/zoologia.35.e21933