Which part of human blood helps in "clotting of blood"?
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → Blood Platelets
Platelets (thrombocytes) are small cell fragments in the blood. At a cut they stick together to plug the wound and release substances that start the clotting process, in which fibrinogen of the plasma is turned into threads of fibrin that catch blood cells and form the clot.
Why the other options are incorrect
Option (1) Blood Plasma — Incorrect. Plasma is the liquid part of blood; it carries the clotting proteins, but the platelets set the clotting off.
Option (2) Red Blood Corpuscles (RBC) — Incorrect. Red cells contain haemoglobin and carry oxygen.
Option (4) White Blood Corpuscles (WBC) — Incorrect. White cells fight infection by attacking germs.