Coagulation – the process that protects the body from blood loss, is carried out with the help of plasma proteins and platelets (small non-nuclear cells of irregular shape, formed in the red bone marrow, live 5-7 days). When a vessel is damaged, platelets are also destroyed, releasing thromboplastin, which, when interacting with prothrombin, calcium salts and plasma enzymes, form thrombin. Thrombin and fibrinogen form fibrin, an insoluble protein, the threads of which tighten the wound site and, together with the blood cells trapped in them, form a thrombus.
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