Biology Reference
In-Depth Information
FIGURE 11.8
Outgrowth of neural crest (orange) and axons (grey) through the somites of a vertebrate embryo.
The 'gradient of maturity' is not just a device used to represent different stages in one drawing, but a real feature of
vertebrate development.
FIGURE 11.9
Critical experiments showing that the restriction of axon outgrowth to the anterior half-somite is
controlled by a property of the somite itself, not the neural tube.
