Thrombocytes
Platelets or thrombocytes are the smallest cells in the blood. They are non-nucleated white cells that play an important role in blood clotting (hemostasis). In this process, they form a white thrombus (white because platelets are also white).
Like erythrocytes, thrombocytes are not cells in the classical sense because they are not capable of division due to a lack of genetic information (DNA). Their task is thrombocyte adhesion, thrombocyte aggregation for blocking injured blood vessels and the release of numerous coagulation-promoting substances such as coagulation factors and messengers.