Which factor is labeled as prothrombin?

Prothrombin is specifically identified as Factor II in the coagulation cascade. It is a glycoprotein produced by the liver and plays a crucial role in blood coagulation. When activated, prothrombin is converted into thrombin, a crucial enzyme that catalyzes the conversion of fibrinogen (Factor I) into fibrin, which ultimately leads to the formation of a stable blood clot. This conversion is vital for the hemostatic process, ensuring that blood remains within the vascular system by forming clots at injury sites.

The association of prothrombin with Factor II is significant within the context of hemostasis and coagulation pathways, as it underscores the interconnected nature of the factors involved in maintaining proper blood coagulation. Understanding prothrombin and its function is essential for anyone studying the laboratory aspects of hematology and coagulation.