MESOBLASTIC SOMITES
\mˌɛsəblˈastɪk sˈɒma͡ɪts], \mˌɛsəblˈastɪk sˈɒmaɪts], \m_ˌɛ_s_ə_b_l_ˈa_s_t_ɪ_k s_ˈɒ_m_aɪ_t_s]\
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A row of s's formed on each side of the dorsal ridges of the embryo by the transverse cleavage of the protovertebral column of the mesoblast, and ultimately developed into the spinal ganglia, permanent vertebrae, and muscular and dermal plates. They were formerly called primordial vertebrae and protovertebrae.
By Smith Ely Jelliffe
