Anatomy

Primitive Streak

A linear band of rapidly proliferating cells that begins near the posterior end of an embryo and grows cranially. Primitive streak is formed during GASTRULATION by the convergent migration of primary ectodermal cells (EPIBLAST). The knot at the tip of the streak is called HENSEN NODE.

National Library of MedicineMedical Subject Headings2026

Structured Summary

Abstract

A linear band of rapidly proliferating cells that begins near the posterior end of an embryo and grows cranially. Primitive streak is formed during GASTRULATION by the convergent migration of primary ectodermal cells (EPIBLAST). The knot at the tip of the streak is called HENSEN NODE.

MeSH Record

Classification

Broader headings

Related Concepts

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MeSH Record

Synonyms

3 entry terms
  • Primitive Streaks
  • Streak, Primitive
  • Streaks, Primitive

MeSH Record

Aspects Covered

24 allowable subheadings

Indexed with the subheadings abnormalities, anatomy & histology, blood supply, chemistry, cytology, diagnostic imaging, drug effects, embryology, enzymology, growth & development, immunology, injuries, innervation, metabolism, microbiology, parasitology, pathology, physiology, physiopathology, radiation effects, surgery, transplantation, ultrastructure, virology.

MeSH Record

History Note

2008; use GASTRULA 1979-2007

MeSH Record

Previous Indexing

  • Embryo (1961-2007)
  • Gastrula (1979-2007)

MeSH Hierarchy

Tree Number

  1. A16.830w

AMA Style

References

  1. National Library of Medicine. Primitive Streak. Medical Subject Headings (MeSH). 2026. Unique ID D054240. http://id.nlm.nih.gov/mesh/2026/D054240
  2. Primitive Streak. In: Wikipedia. https://en.wikipedia.org/wiki/Primitive_streak
  3. Primitive Streak. In: Wikidata. https://www.wikidata.org/wiki/Q247512