Cells, Tissues and Organs

• Cells have different structures that allow

  them to carry out different functions.
• Cells are the basic units of life, because it is the smallest unit that can lead to independent life.
• Tissue

  
  

  • Tissues are a group of cells specialised to perform a particular function (or functions).

  
  

  • muscle tissue is made up of many muscle cells.

  
  

  • nervous tissue is made up of many nerve cells
• Organ

  
  

  -Organs are made up of several different tissues that work together to perform one or more functions.
• System

  
  

  • Systems are made up of several different organs that work together to perform one or more functions (e.g. digestive system)