Term Name:	endocardial cushion cell
Synonyms:
Definition:	A mesenchymal cell of the endocardial cushion. These cells develop via an epithelial to mesenchymal transition when endocardial cells break cell-to-cell contacts and migrate into the cardiac jelly. Cells from this population form the heart septa and valves.
Ontology:	Cell Ontology [CL:0008022]