scanning and transmission em analyses of this region demonstrate a marked change in the morphology of the mesenchymal cells underlying the surface epithelium in treated versus control day 11 ( 7-tail somite ) embryos : long , branching cellular processes , which form a dense meshwork that appears to interact with the epithelial basement lamina in control embryos are undeveloped or absent in phenytoin-treated embryos .
C0524984
change
C0014609
epithelium