Clefts form between somites.
More CAMS should be synthesized as cells become epithelial. They labeled lateral plate cells with dye and then observed their migration. Alternatively, only a subpopulation receiving an additional signal, e.g. by virtue of being close to somites, may respond. Comments and Clarifications and Corrections New Review Articles New Research Articles Web Sites Great SEMs and drawings of mouse and human embryonic development may be found on this web site, which is slated for additional illustrations of pre-implantation and fetal development as well as the genesis of birth defects.