Figure 4.

This schematic summarizes data compiled from the images of Gros et al.⁴⁵ Mesenchymal cells in different regions of the developing chick limb bud exhibit distinct morphologies. Cells in the dorsal and ventral domains (green dashed boundaries) appear more spindle-like and organized than cells in the central and distal domains (orange and red dashed boundaries, respectively). Cell division and cell migration in the dorsal and ventral domains are aligned to the ectoderm (blue line). Cells in the central domain appear rounder with fewer and less active protrusions than cells in the distal domain.