WordNet

the process in which a gastrula develops from a blastula by the inward migration of cells
double-walled stage of the embryo resulting from invagination of the blastula; the outer layer of cells is the ectoderm and the inner layer differentiates into the mesoderm and endoderm

English Journal

Internalization of multiple cells during C. elegans gastrulation depends on common cytoskeletal mechanisms but different cell polarity and cell fate regulators.

Harrell JR, Goldstein B.SourceBiology Department, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599, USA.
Developmental biology.Dev Biol.2011 Feb 1;350(1):1-12. Epub 2010 Sep 26.
Understanding the links between developmental patterning mechanisms and force-producing cytoskeletal mechanisms is a central goal in studies of morphogenesis. Gastrulation is the first morphogenetic event in the development of many organisms. Gastrulation involves the internalization of surface cell
PMID 20875815

Opposing Nodal/Vg1 and BMP signals mediate axial patterning in embryos of the basal chordate amphioxus.

Onai T, Yu JK, Blitz IL, Cho KW, Holland LZ.SourceMarine Biology Research Division, Scripps Institution of Oceanography, University of California San Diego, La Jolla, CA 92093-0202, USA.
Developmental biology.Dev Biol.2010 Aug 1;344(1):377-89. Epub 2010 May 19.
The basal chordate amphioxus resembles vertebrates in having a dorsal, hollow nerve cord, a notochord and somites. However, it lacks extensive gene duplications, and its embryos are small and gastrulate by simple invagination. Here we demonstrate that Nodal/Vg1 signaling acts from early cleavage thr
PMID 20488174