Medical Subject Headings

Last uploaded: March 22, 2026
Id http://purl.bioontology.org/ontology/MESH/D054240
http://purl.bioontology.org/ontology/MESH/D054240
Preferred Name

Primitive Streak

Definitions
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.
Synonyms
Streaks, Primitive
Streak, Primitive
Primitive Streaks
Type http://www.w3.org/2002/07/owl#Class
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