Plasmin is an enzyme in the body that plays a crucial role in breaking down blood clots. It is formed from its inactive precursor, plasminogen, which is activated during the process of fibrinolysis. This process helps to maintain normal blood flow and prevent excessive clotting after injuries. The activity of plasmin is essential for wound healing and tissue repair. By dissolving fibrin, the main component of blood clots, plasmin ensures that clots do not persist longer than necessary. This regulation is vital for overall cardiovascular health and helps prevent conditions like thrombosis.