19. After the neurula stage
and from its ventral portion to
the dorsal how can the
morphology of the embryo be
described?

Gap-fill exercise

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In a schematic longitudinal of
the embryo after neurula stage, the
outermost of cells is the .
In the ventral region the
archenteron tube formed endodermal
cells. In both of the embryo
coeloms by mesoderm are
present. the central region above
archenteron and in the of the
coeloms there the notochord. In the
region just above the
lies the neural tube.