出典:Wikipedia
出典:『Wikipedia』 (2011/05/21 07:24 UTC 版)
In embryology, the limb bud is a structure formed by the developing limb, derived from lateral plate mesoderm. It is intimately related with the apical ectodermal ridge, which secretes factors (fibroblast growth factors [FGF] for example) inducing the initial differentiation of the limb bud. In turn, the mesodermal tissue of the limb bud secretes factors sustaining the development of the Apical Ectodermal Ridge.