Primitive streak

{
  "id": "MLC-T-CHM-009462",
  "term": "Primitive streak",
  "field": "Chemistry",
  "definition": "A transient structure that forms in the early embryo during gastrulation, marking the beginning of germ layer formation. It appears as a thickened band of cells on the dorsal surface of the epiblast. Cells migrate through the primitive streak to form the endoderm and mesoderm, establishing the body axes.",
  "subject": "Chemistry and Human Health",
  "see_also": [
    "blastula",
    "embryogenesis",
    "gastrulation",
    "germ layer"
  ],
  "references": [
    "PAC, 2016, 88, 713. 'Glossary of terms used in developmental and reproductive toxicology (IUPAC Recommendations 2016)' on page 796 (https://doi.org/10.1515/pac-2015-1202)"
  ],
  "url": "https://mlchart.com/terminology/chemistry/primitive-streak/"
}