primitive segment


: any one of the transverse segments into which the body of the embryo of vertebrates becomes marked off by the formation beginning first in the neck region of a series of distinctly limited masses of mesoblast cells on each side of the neural tube

called also protovertebra

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Dictionary Entries Near primitive segment

Cite this Entry

“Primitive segment.” Dictionary, Merriam-Webster, Accessed 24 Apr. 2024.

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