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"Frontiers in Bioscience"

PLATE NUMBER

STAGE

TIME

ORIENTATION

IMAGE

34

Early tail bud stage

Embryo stage 23

1 d 45 min p.f.

Dorsal

Posterior Anterior

Ventral

Parasagittal section

Early tail bud stage (embryo stage 23)

At this stage, the segmentation of the paraxial mesoderm has led to the formation of ten somites.