Plate 18
|
PLATE NUMBER |
STAGE |
TIME |
ORIENTATION |
IMAGE |
|
18 |
Small yolk plug stage Embryo stage 12 1/2 |
14 h 30 min p.f. |
Dorsal
Ventral |
Central transversal section |
Small yolk plug (advanced Gastrula) stage
The dorsal-midline aspect of the neural plate is made of the so-called "notoplate". Within this region, the ectodermal layers are thinned out.