Topic Summaries

Cell specialisation

GCSE > Biology > Eduqas > GCSE Biology Topic Summaries > Cells > Cell specialisation
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Cell Function Specialised structure

Sperm cell (animal)

Travel through the female reproductive system to fertilise an ovum (egg cell)
  • Tail to swim
  • Large number of mitochondria to release energy to swim

Nerve cell (animal)

Transmit electrical signals quickly through nervous system
  • Long cell extension (axons)
  • Myelin sheath insulator increases the speed of transmission of electrical impulses
  • Cell body has extensions to pick up signals from neighbouring cells

Muscle cell (animal)

Contract and relax
  • Large number of mitochondria to provide energy for contraction

Root hair cell (plant)

Absorb water and minerals from soil
  • Small thin extension to increase surface area for absorption of water and minerals

Xylem (plant)

Carry water and dissolved minerals upwards from roots up plant stems for transpiration
  • Empty dead cells form long hollow tubes with no end walls
  • Lignin inside walls supports plant weight

Phloem cell (plant)

Carry sucrose in cell sap from leaves to other parts of the plant via translocation
  • Living cells form tubes
  • Contain few organelles so sugar travels easily
  • End walls contain small holes (sieve plates)

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