Scanning electron micrograph (SEM) showing an activated platelet (thrombocyte) adherent to a dental implant surface. The platelet is trapped in a mesh of fibrin strands during the hemostatic process of wound healing. The envelope of the platelet is disrupted, in order to release enzymes and growth factors needed for the following stages of wound healing. The platelet is trapped in a mesh of fibrin strands during the hemostatic process of wound healing. Activated platelets play a crucial role in the hemostatic process of wound healing. Fibrin is a protein formed from fibrinogen during the clotting of blood. Magnification: ?5000 when printed at 10 centimetres wide.