part_of part of part of develops_from develops from anatomical entity anatomical entity primordium lateral plate mesoderm heart primordium BTO:0001887 UBERON:0003084 Bilateral groups of cells consisting of three rows: one row of endocardial precursors medially and two rows of myocardical precursors laterally. The two populations fuse at the midline between 21 and 26 somites to form the heart rudiment or cone. Stainier 2001.[TAO] uberon TAO:0000028 UMLS:C1514450 cardiac field Bilateral groups of cells consisting of three rows: one row of endocardial precursors medially and two rows of myocardical precursors laterally. The two populations fuse at the midline to form the heart rudiment or cone. AAO:0011044 NCIT:C34276 should probably be merged with heart rudiment. fused heart primordium ZFA:0000028 relationship loss: develops_from lateral mesoderm (TAO:0001065)[TAO] XAO:0000336 The fused aspects of ventral mesoderm, which have migrated from either side of the prechordal plate, and fused ventrally, just behind the cement gland. They will give rise to the endocardium at NF stage 27&28.[AAO] primary heart field cardiovascular system cardiogenic splanchnic mesoderm