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Primitive pit

A small depression in the center of the primitive node, located at the cranial end of the primitive groove, and the site of cranial epiblast… 
National Institutes of Health

Papers overview

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2014
2014
espanolEste trabajo quiere dar a conocer Ia existencia de tres grabados que representan a la Virgen del Rocio, los cuales habian… 
1983
1983
To learn the origin and early migration of notochordal cells in the chick embryo, tritiated thymidine‐labeled grafts were… 
1967
1967
  • J. Butros
  • Journal of embryology and experimental morphology
  • 1967
  • Corpus ID: 13103890
The author has been using post-nodal segments of early chick blastoderms as an experimental system to study early morphogenesis… 
1931
1931
After fertilization of the ovum, segmentation and gastrulation, the embryo becomes, during the second week, a simple disc…