Figure 2 from: 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

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.