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Developmental Biology  Early embryonic development Early development in selected invertebrates Early Development of the Nematode Caenorhabditis elegans Figure 8.47. Gastrulation in C. elegans. (A) Positions of founder cells and their descendants at the 26-cell stage, just prior to gastrulation. (B) 102-cell stage, after the migration of the E, P4, and D descendants. (C) Positions of the cells near the end of gastrulation. The dotted and dashed lines represent regions of the hypodermis contributed by AB and C, respectively. (D) Early gastrulation, as the two E cells start moving inward. (After Schierenberg 1998; photograph courtesy of E. Schierenberg.) |
