Why blood is not clotting inside the body? Why it clots during an accident?

Blood does not clot inside the body due to the presence of anticoagulant heparin.

As soon as any injury takes place externally over the body, the clotting agents like thrombin, fibrinogen, vitamin K helps in the clotting of blood and prevent blood loss externally over the body. 

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Updated on: 16-Jan-2023

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