Plasma proteins that are necessary for blood clotting the?

The plasma proteins that are necessary for blood clotting are called coagulation factors.

There are 13 different coagulation factors, which are numbered from I to XIII. Each of these factors plays a specific role in the clotting process.

The most important coagulation factors are:

* Factor I (fibrinogen): This is the protein that forms the fibrin strands that make up a blood clot.

* Factor II (prothrombin): This protein is converted into thrombin, which is the enzyme that catalyzes the formation of fibrin.

* Factor VIII (antihemophilic factor): This protein is necessary for the activation of factor X.

* Factor IX (Christmas factor): This protein is also necessary for the activation of factor X.

* Factor X (Stuart factor): This protein is activated by factor IX and then activates factor II.

* Factor XI (plasma thromboplastin antecedent): This protein is activated by factor XII and then activates factor IX.

* Factor XII (Hageman factor): This protein is activated by contact with damaged blood vessels and then activates factor XI.

* Factor XIII (fibrin stabilizing factor): This protein stabilizes the fibrin strands in a blood clot by forming covalent bonds between them.