Principles of Organisation

• • Cells are basic building blocks of all living organisms
  • Cells are the smallest unit of life
• • A tissue is a group of cells with similar structure and function

  e.g

  • Muscular tissue - contract to move
  • Glandular tissue - secrets chemicals
  • Epithelial tissue - covers parts of body - inside cell
• • An organ is a group of tissues that perform specific functions

  e.g

  Stomach made up of:

  • Muscular tissue - moves stomach wall to break food
  • Glandular tissue - makes digestive enzymes
  • Epithelial tissue - cover outside and inside of stomach
• • An organ system is the arrangement of organs working together to form organisms