Explain the mechanism of blood clotting. – NABTEB QUESTION

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1. When bleeding occurs, blood platelets break apart

2. Platelets release chemical into the plasma

3. Causing plasma protein prothrombin to become thrombin

4. In the presence of calcium irons

5. Thrombin changes fibrinogen into fibrin

6. Many strands of fibrins, form a mesh

7. Blood cells are trapped in the mesh forming a cloth

8. Clot dries to form scab over the wound.

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