Principles of Organisation

Cards (13)

  • Cells
    Fundamental units of life, each designed to perform specialised functions through a process called DIFFERENTIATION
  • Differentiation
    Cells specialise to perform specific functions
  • Tissues
    Groups of similar cells working together to carry out a particular function.
  • Tissues in mammals
    • Muscular tissue: Responsible for movement by contracting and relaxing
    • Glandular tissue: Produces and releases substances like enzymes and hormones
    • Epithelial tissue: Covers the surfaces of the body, such as the inside of the gut
  • Organs
    group of different tissues working together to carry out a particular function.
  • Heart
    • Organ that contains muscular tissue for PUMPING BLOOD around the body
  • Organ Systems
    Groups of ORGANS working together to carry out a particular function.
    • Muscular tissue
    Responsible for movement by contracting and relaxing
  • Glandular tissue

    Produces and releases substances like enzymes and hormones
  • Epithelial tissue
    Covers the surfaces of the body, such as the inside of the gut
  • cells always start off as undifferentiated (has no function).
    when genes are switched on, they then become specialised to carry out a specific job.
    e.g. specialised muscle cells
  • The digestive system is considered an organ system because it consists of a group of organs that work together to perform the common function of digesting and absorbing our food.
    For e.g: the pancreas releases digestive enzymes (helps break down the food molecules), while the small intestine absorbs the nutrients.
  • organelles -> cells -> tissues -> organs -> organ systems