← ST 111 Week 1, Order of Clood Clotting Export Options Alphabetize Word-Def Delimiter Tab Comma Custom Def-Word Delimiter New Line Semicolon Custom Data Copy and paste the text below. It is read-only. Select All When cells are injured, blood platelets release thromboplastin 1st The liver releases prothrombin and fibrinogen 2nd Prothrombin and thromboplastin form thrombin 3rd Thrombin plus fibrinogen form 'fibrin' a network of fine threads which catch red blood cells 4th Network becomes a blood clot called a thrombus 5th