AQA GCSE Biology Unit 3 Valves

advantages and disadvantages of mechanical and biological valves


AQA GCSE Biology Unit 3 Valves


  • MECHANICAL VALVES last for a long time and keep people alive
  • Increases quality of life (people are less breathless etc)
  • lasts a long time
  • work extremely well
  • patient does not need any medication


  • MECHANICAL VALVES need medication to stop the blood from clotting
  • medicine could potentially have bad side effects-take them for the rest of your life
  • only last for around 15 years therefore need surgery again
  • used from animals, could be frowned upon from those who support animal rights


Altogether the mechanical valves work best as although the patient needs medication there are no issues surrounding it and they last for life unlike biological valves.


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