Specialised Cells

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  • Specialised Cells
    • Animal
      • A motor neurone: transmits nerve impulses
        • Dendrites - allows for many connections to be quickly made
        • Axon (fibre extension) - lets the cells cover a large distance
        • Sheath (tissue that covers the nerve) - protects the nerve and allows faster transition
      • Muscle Cell: allows movement
        • Mitochondria - muscle cells have many mitochondria to release energy for contraction
        • Protein fibres - allow the cell to contract, letting the body move
      • Sperm Cell: Carries genetic information for reproduction
        • Acrosome - contains enzymes to allow the sperm to penetrate the egg
        • Nucleus - contains only one set of genetic information
        • Mitochondria - Sperm have many of these so they have a large energy production for their journey
        • Tail - to propel the sperm to fertile the egg
    • Plant
      • Root Hair Cell: absorbs water and minerals from soil
        • Long extension - Increases surface area
        • No chloroplast - roots cells are underground
        • Mitochondria - lots of mitochondria for active transport
      • Xylem: transports water in plants
        • Hardened cell wall - gives the cell strength
        • Hollow insides - allows water to move through the cell
      • Phloem - transports sugar through the plant
        • Perforated cell wall  - allows sugar to move through the plant
        • Hollow inside with living insides - allows sugar to move through the cell; living cells provide energy
  • Sperm Cell: Carries genetic information for reproduction
    • Acrosome - contains enzymes to allow the sperm to penetrate the egg
    • Nucleus - contains only one set of genetic information
    • Mitochondria - Sperm have many of these so they have a large energy production for their journey
    • Tail - to propel the sperm to fertile the egg

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