Figure 7.

Coeliac and inferior mesenteric plexuses in a CS20 (~49 days) embryo. Panels (a and b) show side views without and with ganglionic cells in the pre‐aortic plexuses, respectively (see also Figure S4B). Panels (c and d) show transverse sections at the levels indicated in panel B. Compared to CS18 and to scattered ganglionic cells (blue arrowheads), clustered ganglionic cells have become paler (P in panels [c and d]). At the level of the IMA (panel d), para‐aortic bodies are substantially larger than at the level of the SMA (panel c). Bars = 500 µm [Colour figure can be viewed at wileyonlinelibrary.com]