Fig. 2
From: The comparative aspects of hystricomorph subplacenta: potential endocrine organ
Capybara subplacenta (H. hydrochaeris) around 90–140 days of gestation. AI Section through the subplacenta showing the junctional zone (Jz) with fetal (arrow) and maternal (*) vessels in the labyrinth layer. AII Subplacenta showing the cytotrophoblast (Ct, arrow) interspersed by the cells of the syncytiotrophoblast (*St) surrounded by vessels (vs.). BI Subplacenta capybara cytokeratin 20X. Observe a positive reaction present in giant trophoblastic cells in the cytotrophoblast region (arrow) and negative reaction in the fetal mesenchyme. BII Subplacenta capybara cytokeratin 60X. Observe a positive reaction present in giant trophoblastic cells in the cytotrophoblast region (arrow) and negative reaction in the fetal mesenchyme (Mf). CI Subplacenta capybara actin 20X. CII Subplacenta capybara actin 60X. Positive marking on the muscular layer of the wall of fetal vessels (Fv) of Capybara Subplacenta (arrow) and cytotrophoblast (Ct-asterisk) cells and negative reaction in the region of the syncytiotrophoblast (St). DI Subplacenta capybara vimentin 20X - Observe the deciduous region (Dc) of the placenta of the capybara and junctional zone (Jz). DII Subplacenta capybara vimentin 60X - Observe positive marking for vimentin in the wall of vessels (arrow) and giant cells (asterisks) surrounded by cytotrophoblast (Ct) cells around the vessels, interspersed by the syncytiotrophoblast (St) region of the Capybara placenta