Back عقدة بدائية Arabic Primitiv düyün Azerbaijani Primitivni čvor BS Nódulo de Hensen Spanish گره آغازین Persian Organisateur de Spemann-Mangold French Primitieve knoop Dutch Węzeł zarodkowy Polish 原結 Chinese
| Primitive node | |
|---|---|
| Details | |
| Days | 17 |
| Identifiers | |
| Latin | nodus primitivus |
| Anatomical terminology | |
The primitive node (or primitive knot) is the organizer for gastrulation in most amniote embryos. In birds, it is known as Hensen's node, and in amphibians, it is known as the Spemann-Mangold organizer. It is induced by the Nieuwkoop center in amphibians, or by the posterior marginal zone in amniotes including birds.
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