Formation of a blood clot
Coagulation is the medical term meaning process of clotting. Thrombogenesis is a related term meaning formation of a clot.
Hemopoiesis or hematopoiesis is the medical term for blood cell formation. Hematopoietic means pertaining to hematopoiesis.hematopoiesis (HEE-mah-toh-poy-EE-sis)hemat/o- = blood + -poiesis = condition of formation
A small cut or wound will stop bleeding due to a process called coagulation, or thrombogenesis. Coagulation is only possible due to the presence of certain enzymes in the blood. It is a complicated process, but this answer will try to make it seem simple. Blood contains an enzyme called thrombin, which is produced in the liver. When a cut occurs, the brain sends a signal to the liver to activate the thrombin, which only becomes active when there is an open wound. Thrombin joins with a specific protein in blood plasma called fibrinogen to form incredibly tiny needlelike crystals called fibrin. The joining of these two substances creates a biochemical alliance that catches blood cells called corpuscles as they try to exit the body through the wound. This, in turn, causes the formation of a plug, or blood clot, which stops the bleeding.