epithelial to mesenchymal transition involved in endocardial cushion formation
A transition where a cardiac epithelial cell loses apical/basolateral polarity, severs intercellular adhesive junctions, degrades basement membrane components and becomes a migratory mesenchymal cell that will contribute to the formation of the endocardial cushion.
GO:0060317
cardiac epithelial to mesenchymal transition
is_a
GO:0003272
endocardial cushion formation
part_of