Mosaic and Regulation Phenomena during the Early Formation of the Chick Blastoderm

Figure 3

Section (plane indicated in Figure 2) through the neural plate anlage (N) with neural groove (arrowhead), developed in a half-chicken embryo after 1 day of culture. C, prechordal plate; M, cranial mesoblast. Harris hematoxylin eosin. Bar = 25 𝜇m.