Differentiation

• Zygote


  A fertilised egg cell with a full set of genes
• Differentiation


  1. Unspecialised cell becomes a more specialised cell type

  2. Controlled by genes
• Tissue


  Cells with a similar function grouped together
• Organ


  A collection of different tissues carrying out a particular function
• Organ system


  Several different organs working together to perform specific functions
• Organism


  Organ systems working together