Blood does not coagulate inside the body due to the presence of___________?

Correct answer: C. Heparin

  • A. Haemoglobin
  • B. Fibrin
  • C. Heparin
  • D. Plasma

Explanation

Heparin is a natural anticoagulant that inhibits clotting reactions within blood vessels. Fibrin, in contrast, is the protein thread that helps form a clot when coagulation occurs.

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