The apical ectodermal ridge

A.  forms at the proximal end of each limb bud.
B.  plays a role in differentiation and elongation of the limb.
C.  ossifies prior to formation of the hand and foot plates.
D.  must undergo apoptosis before the limb can develop.
E.  secretes mesoderm for muscle formation.


B

Anatomy & Physiology

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