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  • Tissues
    • Epithelial tissue
      • Epithelial tissue form a continuous layer, covering the external surfaces of the body and lining the internal surfaces
      • Cuboidal Tissue
        • Simplest form of epithelial tissue
        • Have a cuboid shape
        • The tissue is one cell thick
        • Found in the kidney nephron and duct of the salivary glands
      • Has no blood vessels but may have nerve endings
      • Situated above the basement membrane
      • Columnar epithelium tissue
        • Elongated cells
        • Tubes which substances move through have cillia
      • Squamous
        • Flattened cells on the basement membrane
        • Form wall of the alveoli
        • Line the wall of the Bowman's capsue
    • Muscle tissue
      • Skeletal muscle
        • Attached to bones
        • Generates movemen
        • Voluntary muscle
          • Has visible stripes under microsope
        • Powerful contraction
      • Smooth muscle
        • Formed of spindle shaped cells
        • Contracts rhythmically
        • Contractions are less powerful than skeletal muscle
        • Occurs in walls of blood vessels, digestive and respiratory tract
      • Cardiac muscle
        • Found only in the heart
        • Has visible stripes ubder a microscope
        • Has no long fibres
        • Does not tire
        • Contracts rhythmically
    • Connective tissue
      • Connects, supports and seperates tissues and organs
      • Contains collagen fibres
      • Between fibers are fat storing cells and cells of the immune system
    • Organs
      • A group of tissues in a structural unit working together and performing a specific role
      • Organ systems
        • A group of organs working together for a particular role e.g the digestive system
    • Multicellular organisms have specialised cells forming tissues and organs
      • Stem cells have the potential to become any type of cell in the body
      • Differentiation is the development of a cell into a specific type of cell
        • As a cell differentiates the cell becomes specialised in structure and in the chemical reactions it does


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