Platelets

There are about 300 thousands platelets in a drop of blood. When an injury occures,blood escapes from the broken vessel. Platelets gather at the area and partially plug the break. Tissue-clotting factors results in the conversion of fibriniogen into insoluble fibrin threads, which form a web across the break vessel wallbinding platelets and blood cells. Bruises happen when our injury crushes small blood vessels under the skin causing blood vessels to break open and leak blood. Haemophilia is an inherited condition more likely to occour in males whose platelets lack one of the particular clotting factors suck as firbrin. When clotting factors are missing or deficient, the blood does not clot properly and bleeding continues.....