Learn about blood clotting , a process that prevents excessive bleeding, and its complications, such as DVT and PE. Find out the risk factors, symptoms, and treatments of blood clots, and how to prevent them. Coagulation , also known as clotting, is the process by which blood changes from a liquid to a gel, forming a blood clot. It results in hemostasis, the cessation of blood loss from a damaged vessel, followed by repair. Blood is a necessary component of the human body, and the loss of this fluid may be life-threatening. Blood is generated via hematopoiesis and ultimately becomes the delivery method for oxygen to the tissues and cells. The human body protects against loss of blood through the clotting mechanism. Vascular mechanisms, platelets, coagulation factors, prostaglandins, enzymes, and proteins are the contributors to the clotting mechanism which act together to form clots and stop a loss of blood ... What is the Clotting of Blood ? Blood clotting or clotting of blood , which also refers to the process called haemostasis, is the formation of a gel-like or clot-like structure, preventing bleeding or loss of blood , i.e., haemorrhage in cases of injured blood vessels.