Specialised Cells

• Why does the nerve cell have a long tail?

  To quickly move from different parts of the body to the central nervous system
• What cell is this?

  Sperm cell

  
• What do nerve cells do?

  Send electrical impulses to the brain and body
• What cell is this?

  Nerve cell

  
• Muscle cells contain:

  Filaments of protein that slide over each other to cause muscle contraction
• Muscle cells contain:

  Lots of mitochondria - to provide energy for muscle contraction
• What cells are these?

  Muscle cells

  
• Root hair cells - (plant cells)


  Has a large surface area to efficiently absorb water and minerals

  Don't contain Chloroplasts (because they are underground - chloroplasts are for light-absorption)
• What cell is this?

  Root hair cell

  
• Xylem cells contain:

  No top and bottom walls - to form long tubes to carry water

  Their walls also become thick to support the plant
• What cell is this?

  Xylem cell

  
• Phloem / companion cells

  Transport dissolved sugars and amino acids up and down the stem.
• Phloem cells - (plant cells)

  provide energy required to transport substances into the phloem
• What specialised plant cell is this?

  Phloem cell