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intermediate mesoderm (mesoderm (40 pairs of somites (demotome (dermis on…

- - - - thicken of neural plate
        
        neural groove
        
        neural tube
    - - lift of yolk sac (moves into amnionic cavity)
        
        forms lateral folds and pinches off part of yolk sac
        
        forms primitive gut
        
        pinched yolk sac forms:
        
        foregut
        
        respiratory tract
        
        midgut
        
        liver & pancreas
        
        hindgut
        
        lower GI
  - - - pancreatic serosa
      - limbs
      - dermis
    - - most connective tissue
      - digestive & respiratory
      - heart, blood vessels
      - visceral serosa of ventricle body cavity
  - - - dermis on dorsal
    - - skeletal muscle ( neck, trunk, limbs
    - - vertebrae & ribs