Tissue factor turns inactive factor VII into activate factor VIIa (a for active), and then tissue factor goes on to bind the newly formed factor VIIa to form a complex that turns factor X into active factor Xa.

组织因子使无活性的因子VII转变为活性因子VIIa，之后组织因子结合新形成的因子VIIa，形成一个复合物将因子X转变为活性因子Xa。