Fig. 6. Distribution of neural crest cells as they arrive in the vicinity of the dorsal aorta in a medial explant. (A) Cells initially distributed adjacent to the dorsal aorta. Double-ended arrow indicates dorsal (D) and ventral (V) directions. Dotted circles indicate where SG anlagen will form. (B) High magnification view of cells between developing SG at a later time point in this explant. Dashed line indicates somite boundary. Scale bars: 25 µm. C, caudal somite; R, rostral somite.