Embryonic Folding

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  • lateral edges of endoderm fuse to form midline gut tube
  • ectoderm fuses in midline to form space in lateral plate mesoderm (intrembryonic coelom)
  • lateral plate mesoderm splits to form somatopleure and splanchnopleure around inside and outside respectively
  • cranial end of embryo brought to level of diaphragm
  • occurs in fourth week
 

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