Levels of Organisation

• Levels of Organisation

  1. Mentor class

  2. Year

  3. Key stage group
• Cell

  The most basic unit of a living organism
• Multicellular organism

  Several organ systems working together to perform all the functions needed to stay alive
• There are 5 levels of organisation within an organism
• Cell

  • It is the most basic unit/building block of a living organism
• Tissue

  A group of similar cells that work together to perform a specific function
• Types of tissues

  • Epithelial tissue (part of the skin)
  • Xylem and phloem (plant tissues)
  • Retinal tissue (found in the eye)
  • Muscle tissue
• Forming tissues

  Similar cells that work together to perform a function form a tissue
• Organ

  A group of tissues working together to perform a certain function
• The heart is an organ
• Only animals have organs
• Leaves are organs that are only found in plants
• Tissues that work together form an organ
• Organ system

  A group of organs working together to perform a specific function
• The flower is the only organ system found in most plants
• Organ systems and their functions

  • Circulatory system - Transports materials around the body in blood
  • Respiratory system - Takes in oxygen and removes carbon dioxide
  • Reproductive system - Produces new organisms
• Organs that make up different organ systems

  • Digestive system: Intestines, Stomach, Gullet
  • Respiratory system: Lungs
  • Water transport system: Roots, Stem, Leaf
• Key terms and definitions

  • Cell - The most basic unit of a living organism
  • Tissue - A group of similar cells that work together to perform a specific function
  • Organ - A group of tissues working together to perform a certain function
  • Organ system - A group of organs working together to perform a specific function
  • Multicellular organism - Several organ systems working together to perform all the functions needed to stay alive
• Levels of organisation within a pupil

  1. Cell

  2. Tissue

  3. Organ

  4. Organ System

  5. Multicellular organism