Allows platelets to change shape and move
Contractile element
Stabilizes collagen
Ascorbic acid
Initiate binding of platelet to vessel wall
GPIa
Stabilizes GPIa
GPIIa
Endothelial cell receptor; binds thrombin
Thrombomodulin
Serine protease, activated by thrombomodulin-bound thrombin
Protein C
Cofactor of protein C, binds activated protein C
Protein S
Product of the intrinsic pathway
Factor IXa
Common point of two pathways
activation of X to Xa