Assertion: Blood clotting prevents leakage of blood from the site of an injury.

Reason: It reduces the loss of blood from the system.

Which of the following has no role in blood clotting?

Study the following.
A) Blood coagulation is also called haemolysis.
B) Blood clotting is a change in plasma.
C) Serum does not contain clotting factors like prothrombin and fibrinogen.
D) Proconvertin is involved in extrinsic pathway.

Select the incorrect statement.

The organisation which procures and supplies blood during an emergency.