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Gastrulation, 3rd week

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Mind Map on Gastrulation, 3rd week, created by mccallkb on 07/26/2014.
mccallkb
Mind Map by mccallkb, updated more than 1 year ago
mccallkb
Created by mccallkb about 12 years ago
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Resource summary

Gastrulation, 3rd week
  1. epiblast

    Annotations:

    • source of all of the germ layers. Cells in these layers will give rise to all of the tissues and organs in the embryo
    1. primitive streak
      1. primitive node

        Annotations:

        • cephalic end of the streak. Slightly elevated area surrounding the primitive pit
        1. prenotochordal cells

          Annotations:

          • invaginate in the primitive node
          1. prechordal plate
            1. notochordal plate
              1. detachment from the endoderm
                1. notochord
        2. invagination

          Annotations:

          • cells detach from the epiblast and slip beneath it. Cell migration and specification are controlled by fibroblast growth factor 8 (FGF8)
          1. endoderm

            Annotations:

            • cells that displace the hypoblast
              1. form AVE which expresses- head-forming genes
                1. OTX2
                  1. LIM1
                    1. HESX1
                  2. mesoderm

                    Annotations:

                    • cells that lie between the epiblast and newly created endoderm
                    1. ectoderm

                      Annotations:

                      • cells that remain in the epiblast
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