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neurulation (week 3)(p.72-79), ectoderm, mesoderm (view axis…

- - - - equillibrium system (week 5)
      - acoustic system (week 5)
- - - - neural groove
        
        neural tube
        
        brain vesicle
        
        spinal cord
        
        anterior(cranial) neuropore (closure at day 25)
        
        posterior(caudal) neuropore (closure at day 28)
        
        meninges
    - - epithelial to mesenchymal transition
        
        leave neural ectoderm (after neural closure)
        
        enter ectoderm (after neural closure)
        
        melanocytes in skin
        
        enter mesoderm (after neural closure)
        
        to anterior sides of somites
        
        adrenal medulla
        
        sensory ganglia
        
        Schwann cells
        
        sympathetic ganglions (sympathetic +preaortic chain)
        
        parasympathetic ganglia of GI tract
        
        leave cranial neural folds (before neural closure)
        
        craniofacial skeleton +odontoblast
        
        cranial ganglia
        
        cranial glial cells
        
        smooth muscle cells to blood vessles of cranial region