Fig. 6

Cell dynamics during the early dispersed phase (Wourms’ stages 19–20). The first part of the dispersed phase is characterized by the presence of few EL green or red cells (a). ESL cells are pseudocoloured as large white dots and EL green and red cells as small green and red dots, respectively (b). Tracking of the three cell types over time. The number of each type of cell was constant for more than 10 h (c) and EL cells continuously moved during the whole time. Tracks of individual cells are shown in b, and speed average values in c, right panel. The images and graph refer to the acquired portion of the embryos, equivalent to the superior hemisphere