Assertion: neuroepithelium's cell | /r/CapableOf | induce the ectoderm
Facets:
value: to fold two ridges
type: PURPOSE
value: above them
type: LOCATION
value: after fertilization in humans
type: TEMPORAL
Source sentences:
text: Approximately 3 weeks after fertilization in humans, certain cells in the mesoderm ( i. e. , the notochord cells, which eventually form the spinal column) induce the ectoderm above them to fold upward and form two ridges along the embryo s midline ( see figure) .