Assertion: neuroepithelium's cell | /r/CapableOf | form two ridges
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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) .