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Integumentary System (Components of the integumentary system (Appendages…

- - - - Ex stem cell reproduce two cell
        
        Keratinocyte
        
        Stem cell (same kind)
  - - - Ex: touch sends signal to brain= Receptor in skin
- - - - Is important for bone and strength
      - For muscle function
      - Calcium is super important vitamin , is produced in the sun with the help of UV radiation