platelet measurement chemical chemistry
Platelets are the smallest of the three major types of blood cells. 1  are only about 20% of the diameter of red blood cells. 2  The normal platelet count is 150,000-350,000 per microliter of blood, but since platelets are so small, they make up just a tiny fraction of the blood volume.isorders of Platelet Number: Too Few Platelets. Disorders with low platelet counts are called thrombocytopenias, a term derived from an old name for platelets, âthrombocytesâ. This name describes the platelets as the cells (âcytesâ is a word for cell) that contribute to thrombosis, or blood clotting.