Term Name:	blood coagulation, extrinsic pathway
Synonyms:	initiation of blood coagulation cascade, tissue factor pathway
Definition:	A protein activation cascade that initiates blood coagulation, starting with a signal from tissue factor (TF), a cell-surface, integral-membrane protein, which converts Factor IX to IXa, and Factor IXa converts Factor X to Xa. Factor Xa then initiates the common pathway.
Ontology:	GO: Biological Process [GO:0007598]    QuickGO    AmiGO