Blood clotting

Category B - full version without watermark 1024x576 (check terms and conditions at The embed version with watermark is free of charge. - Description: In order to keep blood loss to a minimum with trauma, so called thrombocytes attach to the damaged vessel wall and form a clot. Simultaneously certain proteins -- so called coagulation factors -- are activated to stabilize the blood clot. These coagulation factors are synthesized from vitamin K in the liver.