Blood clotting

  • Platelets release substances

  • Causes and cascade of events (enzyme cascade)

  • Leads to formation of fibrin (fibrous, insoluble protein)

  • Fibrin forms a network around wound that traps platelets

  • Causes blood to clot and a scab to form.

For OCR a level biology, names of clotting factors/all steps in the cascade are not required.