principles of organization

• cells:

  • basic building blocks of all living organisms
  • make up all living things
  • multiple cells make a tissue
• tissue:

  • group of cells with a similar structure and function
  • multiple tissues make an organ
• organ:

  • aggregations of tissues
  • perform specific functions
  • multiple organs make an organ system
• organ system:

  • organized organs
  • multiple organ systems work together to form organisms