Figure 3
From: Epithelial–mesenchymal transformation and apoptosis in rat urethra development
HE-stained section of rat genital tubercle on ED 19. (a) At the ventral aspect of the GT, a U-shaped invagination of the urethral plate into mesenchyme is seen. A membrane is seen bridging the recess caused by the invagination (arrows; × 200). (b) Magnified view shows that the thin membrane is connected with the edge of the urethral plate, and thus forms a closed urethral cavity (× 400). ED, embryonic day; GT, genital tubercle; HE, hematoxylin and eosin.
