Enamel knot

In tooth development, the enamel knot is a localization of cells on an enamel organ that appear thickened in the center of the inner enamel epithelium. The enamel knot is frequently associated with an enamel cord. It is formed in the cap stage and undergoes apoptosis in the bell stage. ==The enamel knot as signaling center== The enamel knot is a s...
Found on http://en.wikipedia.org/wiki/Enamel_knot
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