Thrombocytes are also known as which component of blood?

• A. Platelets
• B. Red blood cells
• C. White blood cells
• D. Plasma

Answer: (A)

Thrombocytes are platelets, the small fragments of cells that circulate in blood and are essential for stopping bleeding. They originate from megakaryocytes in the bone marrow and have a short lifespan. When a vessel is damaged, platelets adhere to the exposed wall, become activated, and aggregate to form a platelet plug. They also release chemical signals that promote further platelet recruitment and help initiate the coagulation cascade to form a stable fibrin clot. This specialized role sets platelets apart from red blood cells, which carry oxygen; white blood cells, which defend against infections; and plasma, the liquid portion that transports cells and coagulation factors.