Term Name:	primary heart field specification
Synonyms:	FHS specification, first heart field specification
Definition:	The process that results in the delineation of a specific region of the lateral mesoderm into the area which will form the primary beating heart tube. In mammals the primary heart field gives rise to the left ventricle.
Ontology:	GO: Biological Process [GO:0003138]    QuickGO    AmiGO