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Cell (Tissue (The four types of tissue are (Connective tissue (This tissue…

- - - - Group of organs that work together to complete complex functions.
      - Homeostasis is maintaining a stable internal environment.
        
        Respiratory triggers faster breathing if oxygen is needed.
        
        Excretory triggers water retention by kidneys if dehydrated
        
        Endocrine triggers insulin if too much sugar in blood
    - - Heart
        
        Pumps blood to the body.
      - Skin
        
        Protects inner layers of skin from exterior particles.
      - Lungs
        
        Supplies oxygen to blood.
  - - - This tissue forms the body's structure.
    - - Liner of inner and outer body surfaces.
    - - This tissue can easily and repeatedly contract.
    - - Neurons that carry an electrical signal.