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"Frontiers in Bioscience"

PLATE NUMBER

STAGE

TIME

ORIENTATION

IMAGE

29

Neural tube stage

Embryo stage 20

21 h 45 min p.f.

Dorsal

Posterior Anterior

Ventral

Parasagittal section

Neural tube stage (embryo stage 20)

In this stage, the formation of the somites continues. So far, several somites have been formed from the paraxial mesoderm and the seventh one is in the process of rotation.