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GCSE Biology Paper 1 (9-1 Exams)

Valve Ways Valves Heart Damaged Damage Tissue Stiffen

Front What are the two ways that the valves in the heart may be damaged?
Back
  • Damage may cause valve tissue to stiffen, so it won't open properly
  • Valve may become leaky, allowing blood to flow in both directions rather than just forward

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