Question #3ee77

1 Answer
Nov 18, 2017



The liquid present in blood before blood coagulation is known as the plasma ( 90% water ). However, during blood clotting ( coagulation ), the plasma releases thrombokinase which catalyses the conversion of the plasma protein prothrombin to thrombin, in the presence of calcium ions. Thrombin then catalyses the conversion of fibrinogen to insoluble fibrin threads to form a clot ( coagulated blood ).

Hence, after the coagulation of blood, the plasma is depleted of fibrinogen and substances involved in blood clotting, which is also known as the serum.