Factors Vc is a protein that plays a crucial role in the blood coagulation process. It is part of the coagulation cascade, which is a series of reactions that lead to the formation of a blood clot. When a blood vessel is injured, Factors Vc is activated and helps convert prothrombin into thrombin, an essential enzyme for clot formation. The activation of Factors Vc is dependent on the presence of calcium ions and phospholipids, which are found in cell membranes. This protein is produced in the liver and circulates in the bloodstream in an inactive form until it is needed for clotting. Proper functioning of Factors Vc is vital for preventing excessive bleeding during injuries.