Blood does not clot in human body due to the presence of

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Blood does not clot in human body due to the presence of Answer: Heparin

Blood does not coagulate inside the body primarily due to the presence of heparin, a natural anticoagulant. Other substances like antithrombin also play a role by deactivating clotting factors once they are formed.

Question context

This question is part of 🔬 General Science within the broader 🌐 Current Affairs & GK subject and appears in the ASF Airports Security Force preparation collection. Reviewing the answer together with nearby questions helps reinforce the underlying concept and identify how it may appear in competitive exams.