Neural tube — Free Biology Illustration

Biology

Neural tube

Early embryonic neural tube shown as a hollow cylindrical tissue structure, either in cross-section or as a short slightly curved segment in slight perspective or partial side view. It has a smooth rounded outer surface, softly folded and slightly thickened walls of tightly packed epithelial cells, and a clearly defined central lumen or canal. In cross-section it appears as a rounded or oval ring of pale pink, lavender, or bluish-purple cells with darker nuclei surrounding the lumen, sometimes with a subtly darker outer cell layer. In elongated views, one end may show the open lumen and appear slightly thicker, and a subtle dorsal seam may mark closure of the early nervous system structure.

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