Platelets
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Derived from megakaryocytes
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Functions - adhesion, activation, secretion, aggregation
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Release: serotonin, adrenalin, ADP, prostaglandins, thromboxanes
Classification of platelet abnormalities
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Disorders of number
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Thrombocytopenia: bleeding - petechiae, ecchymosis, epistaxis
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Thrombocythaemia: splenomegaly, haemorrhages, thrombotic episodes
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Disorders of function
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Thrombasthenia
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