Normal hemostasis and coagulation Anticoagulant system 1. anticoagulin (1) each coagulate factor and their complex has its own inhibitor (2)important AT-II: 70%anticoagulant activity serine proteinase inhibitor a.Ⅻa.XIa.ⅨXa.DKNormal hemostasis and coagulation • Anticoagulant system： 1. anticoagulin： （1）each coagulate factor and their complex has its own inhibitor （2）important： AT-Ⅲ：70% anticoagulant activity serine proteinase inhibitor Ⅱa. Ⅻa. Ⅺa. Ⅸa. DK