How is a blood clot formed (in the arteries)

The process of thrombosis blood vessels are damaged platelets attach to the exposed collagen fibres thromboplastin is released from the platelets triggering the conversion of the prothrombin protein into the thrombin enzyme calcium ions and vitamin K must be present for the conversion to occur Thrombin then catalyses the conversion of soluble fibrinogen into insoluble fibrin fibrin forms the a network of fibres that traps platelets and red blood cells to form the blood clot