Plasminogen is a protein found in blood plasma that plays a crucial role in the body's ability to break down blood clots. It is produced by the liver and circulates in an inactive form. When a clot forms, plasminogen is activated to become plasmin, an enzyme that digests fibrin, the main component of blood clots. The conversion of plasminogen to plasmin is essential for the process of fibrinolysis, which helps maintain normal blood flow and prevents excessive clotting. This process is vital for healing and recovery after injuries, ensuring that the body can effectively manage its clotting and healing mechanisms.