Human Biology F221 Human Bio blood clotting and first aid to prevent excess blood loss 2.0 / 5 based on 1 rating ? Human BiologyHuman, animal and plant physiologyAS Created by: Deborah RobertoCreated on: 03-05-12 15:43 blood clotting Blood clotting: damaged tissues expose collagen to the air blood platelets become trapped in the fibres making other platelets sticky the tissues and damaged platelets release the enzyme thromboplastin thromboplastin coverts the blood protein prothrombin into an active enzyme thrombin thrombin converts the blood protein fibrinogen into long insoluble fibrin fibres the fibres form a mesh that traps blood cells to form a blood clot 1 of 2 first aid prevent excessive blood loss by: sit the person down raise the damaged limb e.g arm or leg check for foreign objects in the wound if nothing is there place a pad over it if something is there do not remove it as this could cause more bleeding cut the pad around the wound, if the blood soaks the pad dont change it, add another on top as this could disturb the healing process seek proper medical help 2 of 2
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