Question

What is the first stage of blood clotting?

Answer 1

Blood clotting:

1. Blood clotting is also called coagulation, which is a natural process that prevents excessive bleeding when a blood vessel is injured.
2. A blood clot is a mass of blood that forms when platelet and plasma proteins stick together to stop the bleeding.

There are 3 stages in the blood clotting process:

1. Constriction of the blood vessel: Contraction of blood vessels by small muscles in their walls makes the movement of blood flow slow or blocked. Norepinephrine and epinephrine help in vasoconstriction
2. Formation of a temporary “platelet plug."
3. Activation of the coagulation cascade.
4. Formation of “fibrin plug” or the final clot.
5. Hence, Constriction of the blood vessel is the first stage of blood clotting.