part_of part of part of transformation of embryonic structure prechordal plate EHDAA2:0001493 UBERON:0003063 EHDAA:181 A horseshoe-shaped thickening of the endoderm at the cranial (rostral) end of the primitive streak formed by the involution of Spemann's organizer cells which, together with the notochord, induces the formation of the neural plate from the overlying ectodermal cells and contributes mesodermal type cells to the surrounding tissue. head mesenchyme TAO:0000060 ZFA:0000060 XAO:0000079 VHOG:0000086 FMA:295532 AAO:0011085 head mesoderm Wikipedia:Prechordal_plate axial mesoderm prechordal mesoderm