How do fibrin threads formed?

Fibrin threads are formed through the conversion of fibrinogen, a soluble plasma protein, into insoluble fibrin by the enzyme thrombin during the clotting process. When blood vessels are injured, thrombin is activated, leading to fibrinogen cleavage and the release of fibrin monomers. These monomers then polymerize and aggregate, creating a mesh-like structure that stabilizes the clot and helps stop bleeding. This fibrin network serves as a scaffold for platelets and other cells involved in wound healing.