Which clotting factor is known as fibrinogen?

Fibrinogen is the term used for clotting factor I. This protein plays a critical role in the coagulation cascade, as it is converted into fibrin by the action of thrombin during the final steps of blood clot formation. Fibrin forms the mesh-like structure of the clot, which stabilizes it and helps stop bleeding.

Understanding the clotting factors is essential for appreciating their roles in hemostasis. Other factors listed have different designations and functions within the clotting process; for example, factor II is prothrombin, factor V plays a role in the activation of prothrombin to thrombin, and factor VIII is known for its importance in the intrinsic pathway of coagulation. Each factor has its unique function, but in this instance, fibrinogen is specifically identified as factor I, which underscores its foundational role in clot formation.