Organisation

• Tissues

  Groups of similar cells that act together to perform a similar function
• Organs

  Groups of distinct tissues that work together to perform a specific function
• Organ Systems

  Groups of organs that work together to perform a particular role
• Organism

  The highest level of organisation (in a multicellular organism) consisting of several organ systems
• Levels of Organisation

  Cell

  Tissue

  Organ

  Organ System

  Organism