The platelets (thrombocytes) do not have a nucleus. They play a part in blood clotting. They develop by splitting off from a megakaryocyte. They can be divided into a cetral granulomere with granules and mitochondria and a surrounding hyalomere with contractile microfilaments (yellow).
Thrombocytengranula mit dichtem Inhalt (Serotonin, ADP, ATP) - Dense granules, platelet granules with densely packed contents (serotonine, ADP, ATP)