So we have the extrinsic and intrinsic pathway, which basically work together to amplify the number of protein or enzyme x that we produce, which ultimately then follows the final common pathway. So the extrinsic and intrinsic pathways basically converge into the final common pathway that ultimately forms and activates Thrombin, which then goes on to activate Fibrinogen into fibrin. So blood clots are formed via series of zymogen activations. This cascade consists of the extrinsic and the intrinsic pathways that work together to amplify the activation of an important seren protease known as Thrombin. And Thrombin is that serum protease that is needed to actually proteolytically activate fibrinogen, which then basically forms these aggregates we call fibrin molecules, which consist of this meshlike network that is used to actually seal off that particular clot. So that particular cut and these are known as blood clots.