Multiple choice Which of the following blood cells helps in cessation of bleeding during injury? RBC WBC Erythrocyte Thrombocyte Lymphocyte Reveal answer Fill a bubble to check yourself D Correct answer Explanation Platelets (thrombocytes) are the smallest type of blood cells, which play an important role in blood clotting. When bleeding occurs, the platelets swell and clump together and form a sticky plug, which helps to stop the bleeding.