bhone marrow
They are called as platelets.
Prothrombin-->Thrombin; Fibrinogen--> Fibrin (activated by thrombin)The sequence of blood clotting is called Coagulation.
activated when clotting or blood repair is needed
Clotting factors will be activated.
A formed element present in the blood called platelets are essential in blood clotting. Also, chemicals known as clotting factors circulate and are activated by an injury.
Proteins involved in the blood clotting process form a barrier to stop the blood loose from injury. there are various blood clotting factors, thrombin, and fibrin are all involved in the biochemical cascade to make the fibrin clot at the end. They generally activated by each other from its precursor protein such as prothrombin, fibrinogen.
They really are not cells by definition but they are fragments called platelets of rather large cells called megakaryocytes.
Platelets help with blood clotting
The chief plasma component to the clotting of blood is the platelet. The additional components include blood clotting factors.
Red blood cells do not initiate clotting. Platelets initiate clotting.
Hemophilia
An anticoagulant stops the blood from clotting.