apical constriction involved in ventral furrow formation
apical constriction involved in ventral furrow formation
The actin-mediated process that results in contraction of the apical end of a polarized columnar epithelial cell, contributing to formation of a ventral indentation (furrow) from the blastoderm epithelium, which is internalized to form a tube in the interior of the embryo, marking the start of gastrulation.