The developmental process pertaining to the initial 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. [ GOC:mtg_heart http://www.ncbi.nlm.nih.gov/pubmed/15797462 ]
This is just here as a test because I lose it
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Equivalent to:
- anatomical structure formation involved in morphogenesis and results in formation of some endocardial cushion