<prompt> Platelet Dens granules contain all except -ADP5-HTCalsiumVwF  <response>: harshmohan textbook of pathology 7 th edition Platelet granules are released by the activated platelets .one of the platelet granules is dense bodies and their release liberates ADP ,ionic calcum ,5_HT,Histamine and epinephrine.VWF is synthesised by endothelial cells 