It derives during gastrulation from cells that migrate anteriorly in the midline between the hypoblast and the epiblast.
It derives during gastrulation from cells that migrate anteriorly in the midline between the hypoblast and the epiblast. In higher mammals it is incorporated into a more advanced structure as discs termed nuclei pulposi. It is a flexible rodlike structure of mesodermal cells in chordates that is the principle longitudinal structural element. The cells that form it coalesce immediately beneath the developing central nervous system. FTP, name this predecessor to the spinal column.
It derives during gastrulation from cells that migrate anteriorly in the midline between the hypoblast and the epiblast.
{Notochord}