cell migration involved in endocardial cushion formation
The orderly movement of a cell from one site to another that will contribute to the formation of an endocardial cushion. The endocardial cushion is a specialized region of mesenchymal cells that will give rise to the heart septa and valves.
GO:0060973
cell migration involved in heart development
is_a
GO:0003272
endocardial cushion formation
part_of