AI-generated practice question — model-generated for extra practice, not a previous-year CBSE board question.
Platelets help clot the blood at points of injury, thereby plugging leaks in blood vessels and preventing excessive blood loss.
Source: Life Processes, Section 5.4.1 (Maintenance by platelets)
The passage directly states that platelet cells "circulate around the body and plug these leaks by helping to clot the blood at these points of injury." For 1 mark, simply state this clotting/plugging function — no extra detail needed.