Gastrulation, 3rd week

mccallkb
Mind Map by mccallkb, updated more than 1 year ago
mccallkb
Created by mccallkb over 5 years ago
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Mind Map on Gastrulation, 3rd week, created by mccallkb on 07/26/2014.
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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
1.1 primitive streak
1.1.1 primitive node

Annotations:

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

Annotations:

  • invaginate in the primitive node
1.1.1.1.1 prechordal plate
1.1.1.1.1.1 notochordal plate
1.1.1.1.1.1.1 detachment from the endoderm
1.1.1.1.1.1.1.1 notochord
1.1.2 invagination

Annotations:

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

Annotations:

  • cells that displace the hypoblast
1.1.2.1.1
1.1.2.1.2 form AVE which expresses- head-forming genes
1.1.2.1.2.1 OTX2
1.1.2.1.2.2 LIM1
1.1.2.1.2.3 HESX1
1.1.2.2 mesoderm

Annotations:

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

Annotations:

  • cells that remain in the epiblast
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